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Behavioural and Social Drivers of Seasonal Influenza Vaccination (BeSD IN) in Jordan
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-04-08 DOI: 10.1016/j.jvacx.2025.100643
Ayman Bani Mousa , Nizar Maswadi , Zaid Al-Hamdan , Mohammad Alhawarat , Lora Al Sawalha , Raid Anwar Al-Shboul , Feras Ibrahim Hawari

Background

Cultural norms and social beliefs play a significant role in shaping attitudes toward vaccination. The Jordanian Ministry of Health, with the support of international health organizations, has launched several initiatives to improve influenza vaccination coverage. However, challenges persist, particularly among certain demographic groups, making it essential to understand the underlying knowledge, behaviors, and attitudes influencing vaccination decisions. This study aims to explore these factors through a large-scale survey conducted among healthcare workers, pregnant women, and elderly people in Jordan.

Method

A cross-sectional survey was designed to identify social and behavioral drivers (BeSD) of influenza vaccination among three key target groups in Jordan: healthcare workers, pregnant women, and the elderly. A convenience sample comprising 1,500 participants was recruited from the three target groups. The sample randomly selected from the three regions in Jordan, Data were collected through interviews conducted by trained and qualified research assistants.

Result

The study revealed that 82.9 % of participants were aware of the influenza vaccine, with healthcare workers showing the highest awareness at 95 %, followed by pregnant women at 76 %, and the elderly at 70 %. Despite high awareness, only 45.6 % of respondents had been vaccinated in the past two years. Healthcare workers had the highest vaccination rates (65 %), while pregnant women (30 %) and the elderly (25 %) exhibited lower rates, primarily due to concerns about vaccine safety and accessibility challenges. Misconceptions were common, with 30 % of participants believing the flu vaccine causes influenza, and 25 % doubting its efficacy. These misconceptions were more prevalent among the elderly and rural populations. Access and affordability were significant barriers, particularly for the elderly, with many reporting difficulties in traveling to vaccination centres and lacking insurance coverage.

Conclusion

To improve influenza vaccination rates, targeted public health campaigns should be conducted to correct misconceptions, especially among the elderly and pregnant women. Possible plans of action for improving uptake rates are improving accessibility by organizing mobile clinics, offering subsidized vaccines, and giving healthcare providers the necessary training to combat hesitancy among the general population. Further research needs to be undertaken to develop strategies for reassuring the public that vaccinations are safe and effective.
{"title":"Behavioural and Social Drivers of Seasonal Influenza Vaccination (BeSD IN) in Jordan","authors":"Ayman Bani Mousa ,&nbsp;Nizar Maswadi ,&nbsp;Zaid Al-Hamdan ,&nbsp;Mohammad Alhawarat ,&nbsp;Lora Al Sawalha ,&nbsp;Raid Anwar Al-Shboul ,&nbsp;Feras Ibrahim Hawari","doi":"10.1016/j.jvacx.2025.100643","DOIUrl":"10.1016/j.jvacx.2025.100643","url":null,"abstract":"<div><h3>Background</h3><div>Cultural norms and social beliefs play a significant role in shaping attitudes toward vaccination. The Jordanian Ministry of Health, with the support of international health organizations, has launched several initiatives to improve influenza vaccination coverage. However, challenges persist, particularly among certain demographic groups, making it essential to understand the underlying knowledge, behaviors, and attitudes influencing vaccination decisions. This study aims to explore these factors through a large-scale survey conducted among healthcare workers, pregnant women, and elderly people in Jordan.</div></div><div><h3>Method</h3><div>A cross-sectional survey was designed to identify social and behavioral drivers (BeSD) of influenza vaccination among three key target groups in Jordan: healthcare workers, pregnant women, and the elderly. A convenience sample comprising 1,500 participants was recruited from the three target groups. The sample randomly selected from the three regions in Jordan, Data were collected through interviews conducted by trained and qualified research assistants.</div></div><div><h3>Result</h3><div>The study revealed that 82.9 % of participants were aware of the influenza vaccine, with healthcare workers showing the highest awareness at 95 %, followed by pregnant women at 76 %, and the elderly at 70 %. Despite high awareness, only 45.6 % of respondents had been vaccinated in the past two years. Healthcare workers had the highest vaccination rates (65 %), while pregnant women (30 %) and the elderly (25 %) exhibited lower rates, primarily due to concerns about vaccine safety and accessibility challenges. Misconceptions were common, with 30 % of participants believing the flu vaccine causes influenza, and 25 % doubting its efficacy. These misconceptions were more prevalent among the elderly and rural populations. Access and affordability were significant barriers, particularly for the elderly, with many reporting difficulties in traveling to vaccination centres and lacking insurance coverage.</div></div><div><h3>Conclusion</h3><div>To improve influenza vaccination rates, targeted public health campaigns should be conducted to correct misconceptions, especially among the elderly and pregnant women. Possible plans of action for improving uptake rates are improving accessibility by organizing mobile clinics, offering subsidized vaccines, and giving healthcare providers the necessary training to combat hesitancy among the general population. Further research needs to be undertaken to develop strategies for reassuring the public that vaccinations are safe and effective.</div></div>","PeriodicalId":43021,"journal":{"name":"Vaccine: X","volume":"24 ","pages":"Article 100643"},"PeriodicalIF":2.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Antibody response after SARS-CoV-2 infection or vaccination in China: A cross-sectional study
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-04-08 DOI: 10.1016/j.jvacx.2025.100644
Peng Zhu , Yan Chen , Xia Xu , Deyong Tan , Ledong Xiao , Chengling Liao , Huan Xia , Ting Zhang , Jing Zou , Xuan Chen , Man Li , Yang Yang , Jian Zhou , Jia Liu , Wei Zhang , Honghao Zhou , Qing Li

Background

It is crucial to understand how antibodies are generated after the individual has been infected or vaccinated to control the COVID-19 pandemic and develop future vaccination strategies.

Methods

The level of SARS-CoV-2 IgG/IgM was assessed in 348 plasma samples in the current study.

Results

Results showed that the SARS-CoV-2 IgG level of mild/moderate infections was higher than that of asymptomatic infections. Strong correlations were found between the SARS-CoV-2 IgG and the geometric mean neutralizing titers (GMTs), detected using pseudotyped neutralization assay, against BA.4/5 (r = 0.776, p < 0.001) or XBB.1.5 (r = 0.329, p = 0.004), while SARS-CoV-2 IgM showed a weaker correlation with BA.4/5 (r = 0.247, p = 0.030). The GMTs against BA.4/5 were higher in mild/moderate infections than in asymptomatic infections. Moreover, we found that the convalescent patients with vaccination had higher antibody responses than the convalescent patients without vaccination. The XBB.1.5 variant, however, was able to escape the immune response induced by BA.5 breakthrough infection and vaccination. To ensure the population maintains a sufficient level of protective antibodies, it might be required to periodically enhance immune responses by administering antigens obtained from the circulating variants.

Conclusions

It is highly essential to optimize vaccination protocols in practice settings and develop future vaccines that offer a broader spectrum of protection.
{"title":"Antibody response after SARS-CoV-2 infection or vaccination in China: A cross-sectional study","authors":"Peng Zhu ,&nbsp;Yan Chen ,&nbsp;Xia Xu ,&nbsp;Deyong Tan ,&nbsp;Ledong Xiao ,&nbsp;Chengling Liao ,&nbsp;Huan Xia ,&nbsp;Ting Zhang ,&nbsp;Jing Zou ,&nbsp;Xuan Chen ,&nbsp;Man Li ,&nbsp;Yang Yang ,&nbsp;Jian Zhou ,&nbsp;Jia Liu ,&nbsp;Wei Zhang ,&nbsp;Honghao Zhou ,&nbsp;Qing Li","doi":"10.1016/j.jvacx.2025.100644","DOIUrl":"10.1016/j.jvacx.2025.100644","url":null,"abstract":"<div><h3>Background</h3><div>It is crucial to understand how antibodies are generated after the individual has been infected or vaccinated to control the COVID-19 pandemic and develop future vaccination strategies.</div></div><div><h3>Methods</h3><div>The level of SARS-CoV-2 IgG/IgM was assessed in 348 plasma samples in the current study.</div></div><div><h3>Results</h3><div>Results showed that the SARS-CoV-2 IgG level of mild/moderate infections was higher than that of asymptomatic infections. Strong correlations were found between the SARS-CoV-2 IgG and the geometric mean neutralizing titers (GMTs), detected using pseudotyped neutralization assay, against BA.4/5 (<em>r</em> = 0.776, <em>p</em> &lt; 0.001) or XBB.1.5 (<em>r</em> = 0.329, <em>p</em> = 0.004), while SARS-CoV-2 IgM showed a weaker correlation with BA.4/5 (<em>r</em> = 0.247, <em>p</em> = 0.030). The GMTs against BA.4/5 were higher in mild/moderate infections than in asymptomatic infections. Moreover, we found that the convalescent patients with vaccination had higher antibody responses than the convalescent patients without vaccination. The XBB.1.5 variant, however, was able to escape the immune response induced by BA.5 breakthrough infection and vaccination. To ensure the population maintains a sufficient level of protective antibodies, it might be required to periodically enhance immune responses by administering antigens obtained from the circulating variants.</div></div><div><h3>Conclusions</h3><div>It is highly essential to optimize vaccination protocols in practice settings and develop future vaccines that offer a broader spectrum of protection.</div></div>","PeriodicalId":43021,"journal":{"name":"Vaccine: X","volume":"24 ","pages":"Article 100644"},"PeriodicalIF":2.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strengthening national immunization program governance: Recent reforms and achievements of the Korean Expert Committee on Immunization Practices (KECIP)
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-04-08 DOI: 10.1016/j.jvacx.2025.100642
So-Yeon Kim , Hang Jin Jeong , Hanseul Ko , Seunghyun Lewis Kwon , Dongwoo Lee
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引用次数: 0
COVID-19 vaccination as a rare potential etiology for cause of death after medicolegal autopsy. A Finnish nationwide study. COVID-19疫苗接种作为法医尸检后死因的罕见潜在病因。芬兰全国性研究。
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-04-08 DOI: 10.1016/j.jvacx.2025.100645
Lasse Pakanen , Tuomo Nieminen , Paula Kuvaja , Hanna Nohynek , Sirkka Goebeler , Miia Artama , Petteri Hovi
COVID-19 vaccinations began globally at the end of 2020. By the end of 2021, 9.8 million doses were given in Finland. Regarding safety, most vaccine-related adverse reactions have been mild, but severe and lethal ones have also occurred. Autopsies in post vaccination deaths may give insight to the extent of fatal health conditions with potential COVID-19 vaccine etiology and provide new hypotheses of possible causalities between vaccination and severe health conditions. We searched the complete documentation on all medicolegal autopsies in Finland between December 2020 and December 2021 to assess how often the indication for autopsy was a suspected fatal adverse reaction to COVID-19 vaccination, and whether vaccination remained a potential etiology for any health condition determined as a cause of death after the autopsy. We linked register-based data on individual COVID-19 vaccination course and pre-existing health conditions. We found 428 autopsy cases with a mention of COVID-19 vaccination, and prior to autopsy, vaccination was suspected to play a part in 76 deaths. Post autopsy, a forensic pathologist considered vaccination to be potentially related to underlying cause of death in five and contributory cause of death in seven autopsy cases. These included seven thromboembolisms, two diabetic ketoacidoses, one myocarditis, one acute pancreatitis, and one eosinophilic granulomatosis with polyangiitis. In relation to the number of vaccinations within Finland, medicolegal autopsies were rarely performed because of a possible vaccine-related severe adverse reaction. Among the autopsies performed for such reasons, only a few considered a vaccine-related severe adverse reaction as a cause of death, although considerable doubt remains in the accuracy of individual considerations, and autopsy cannot definitively confirm causality between vaccination and death. Regarding vaccination safety, continuing evaluation of suspected vaccine-related deaths is essential, and autopsy should be considered in cases of death where vaccine etiology is possible.
{"title":"COVID-19 vaccination as a rare potential etiology for cause of death after medicolegal autopsy. A Finnish nationwide study.","authors":"Lasse Pakanen ,&nbsp;Tuomo Nieminen ,&nbsp;Paula Kuvaja ,&nbsp;Hanna Nohynek ,&nbsp;Sirkka Goebeler ,&nbsp;Miia Artama ,&nbsp;Petteri Hovi","doi":"10.1016/j.jvacx.2025.100645","DOIUrl":"10.1016/j.jvacx.2025.100645","url":null,"abstract":"<div><div>COVID-19 vaccinations began globally at the end of 2020. By the end of 2021, 9.8 million doses were given in Finland. Regarding safety, most vaccine-related adverse reactions have been mild, but severe and lethal ones have also occurred. Autopsies in post vaccination deaths may give insight to the extent of fatal health conditions with potential COVID-19 vaccine etiology and provide new hypotheses of possible causalities between vaccination and severe health conditions. We searched the complete documentation on all medicolegal autopsies in Finland between December 2020 and December 2021 to assess how often the indication for autopsy was a suspected fatal adverse reaction to COVID-19 vaccination, and whether vaccination remained a potential etiology for any health condition determined as a cause of death after the autopsy. We linked register-based data on individual COVID-19 vaccination course and pre-existing health conditions. We found 428 autopsy cases with a mention of COVID-19 vaccination, and prior to autopsy, vaccination was suspected to play a part in 76 deaths. Post autopsy, a forensic pathologist considered vaccination to be potentially related to underlying cause of death in five and contributory cause of death in seven autopsy cases. These included seven thromboembolisms, two diabetic ketoacidoses, one myocarditis, one acute pancreatitis, and one eosinophilic granulomatosis with polyangiitis. In relation to the number of vaccinations within Finland, medicolegal autopsies were rarely performed because of a possible vaccine-related severe adverse reaction. Among the autopsies performed for such reasons, only a few considered a vaccine-related severe adverse reaction as a cause of death, although considerable doubt remains in the accuracy of individual considerations, and autopsy cannot definitively confirm causality between vaccination and death. Regarding vaccination safety, continuing evaluation of suspected vaccine-related deaths is essential, and autopsy should be considered in cases of death where vaccine etiology is possible.</div></div>","PeriodicalId":43021,"journal":{"name":"Vaccine: X","volume":"24 ","pages":"Article 100645"},"PeriodicalIF":2.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Targeting age-appropriate adults' vaccine hesitancy to the herpes zoster vaccine in Ningbo, China: A latent profile analysis
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-04-06 DOI: 10.1016/j.jvacx.2025.100641
Jianmei Wang , Qiuhong Mei , Shaoying Zhou , Tianchi Yang , Mengqian Lyu , Yueyi Feng , Zhaya Wang , Lili Hu , Bingqian Huang , Rui Ma
Abstract
This study aims to clarify the profiles of the psychological antecedents to the herpes zoster vaccine (HZV) among age-appropriate adults in Ningbo. A multistage stratified sampling method was employed to take samples We performed a face-to-face questionnaire survey among adults aged 40 years and older in late 2023. Participants were asked to report demographics, knowledge of HZV, the modified 5C vaccine hesitancy scale, and HZV uptake intention. Confirmatory factor analysis (CFA) was utilized to evaluate the modified 5C scale's validation, and latent profile analysis was used to identify distinct profiles. A total of 2100 participants were investigated, and 2025 valid cases were kept for further analysis. The CFA showed good reliability and validity for the modified 5C scale. The findings indicated three profiles: “skeptics” (24.15 %; high complacency, constraint), “believers” (38.67 %; high confidence, calculation, collective responsibility), and “free riders” (37.19 %; median confidence, calculation, collective responsibility, high complacency, constraint). Compared to believers, skeptics and free riders were older, more likely to reside in urban and suburban areas, lacked Urban Employee Basic Medical Insurance, and knew less about vaccine-related knowledge. From the highest to the lowest on vaccination intention were believers, then free riders, and finally skeptics under four distinct scenarios (recommendations from HCWs, from friends and family, from the media and internet, and HZV is free of charge). Based on 5C psychological antecedents, we identified two other profiles in addition to believers. This research may help build tailored immunization strategies to lessen vaccine hesitancy and increase willingness to receive HZV.
摘要 本研究旨在阐明宁波市适龄成年人接种带状疱疹疫苗(HZV)的心理诱因。本研究采用多阶段分层抽样法,于 2023 年底对 40 岁及以上的成年人进行了面对面的问卷调查。受访者需要报告人口统计学特征、对 HZV 的了解程度、改良的 5C 疫苗犹豫量表以及 HZV 接种意向。我们采用了确证因子分析(CFA)来评估修改后的 5C 量表的有效性,并采用了潜在特征分析来识别不同的特征。共对 2100 名参与者进行了调查,其中 2025 个有效案例被保留作进一步分析。CFA 结果表明,修订版 5C 量表具有良好的信度和效度。研究结果显示了三种特征:"怀疑论者"(24.15%;高度自满、约束)、"信徒"(38.67%;高度自信、计算、集体责任)和 "自由骑行者"(37.19%;中度自信、计算、集体责任、高度自满、约束)。与信奉者相比,怀疑论者和 "搭便车者 "的年龄更大,更有可能居住在城市和郊区,没有城镇职工基本医疗保险,对疫苗相关知识的了解更少。在四种不同的情况下(医护人员推荐、亲朋好友推荐、媒体和网络推荐以及 HZV 免费),疫苗接种意愿从高到低依次为信奉者、免费接种者和怀疑者。根据 5C 心理前因,我们确定了除信仰者之外的另外两种情况。这项研究可能有助于制定有针对性的免疫策略,以减少疫苗接种犹豫,提高接受 HZV 的意愿。
{"title":"Targeting age-appropriate adults' vaccine hesitancy to the herpes zoster vaccine in Ningbo, China: A latent profile analysis","authors":"Jianmei Wang ,&nbsp;Qiuhong Mei ,&nbsp;Shaoying Zhou ,&nbsp;Tianchi Yang ,&nbsp;Mengqian Lyu ,&nbsp;Yueyi Feng ,&nbsp;Zhaya Wang ,&nbsp;Lili Hu ,&nbsp;Bingqian Huang ,&nbsp;Rui Ma","doi":"10.1016/j.jvacx.2025.100641","DOIUrl":"10.1016/j.jvacx.2025.100641","url":null,"abstract":"<div><div>Abstract</div><div>This study aims to clarify the profiles of the psychological antecedents to the herpes zoster vaccine (HZV) among age-appropriate adults in Ningbo. A multistage stratified sampling method was employed to take samples We performed a face-to-face questionnaire survey among adults aged 40 years and older in late 2023. Participants were asked to report demographics, knowledge of HZV, the modified 5C vaccine hesitancy scale, and HZV uptake intention. Confirmatory factor analysis (CFA) was utilized to evaluate the modified 5C scale's validation, and latent profile analysis was used to identify distinct profiles. A total of 2100 participants were investigated, and 2025 valid cases were kept for further analysis. The CFA showed good reliability and validity for the modified 5C scale. The findings indicated three profiles: “skeptics” (24.15 %; high complacency, constraint), “believers” (38.67 %; high confidence, calculation, collective responsibility), and “free riders” (37.19 %; median confidence, calculation, collective responsibility, high complacency, constraint). Compared to believers, skeptics and free riders were older, more likely to reside in urban and suburban areas, lacked Urban Employee Basic Medical Insurance, and knew less about vaccine-related knowledge. From the highest to the lowest on vaccination intention were believers, then free riders, and finally skeptics under four distinct scenarios (recommendations from HCWs, from friends and family, from the media and internet, and HZV is free of charge). Based on 5C psychological antecedents, we identified two other profiles in addition to believers. This research may help build tailored immunization strategies to lessen vaccine hesitancy and increase willingness to receive HZV.</div></div>","PeriodicalId":43021,"journal":{"name":"Vaccine: X","volume":"24 ","pages":"Article 100641"},"PeriodicalIF":2.7,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Household transmission of the SARS-CoV-2 omicron variant in New Zealand, 2022
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-04-06 DOI: 10.1016/j.jvacx.2025.100638
Nayyereh Aminisani , Q. Sue Huang , Lauren Jelley , Timothy Wood , Tineke Jennings , Danielle Currin , Ruth Seeds , Maritza Marull , Amanda Kvalsvig , Michael G. Baker , Nhung Nghiem , Paul G. Thomas , Richard J. Webby , The SHIVERS investigation team

Background

Studying the transmissibility of the SARS-CoV-2 and its driving factors is valuable due to the ongoing emergence of new variants. We examined the household transmission characteristics of the Omicron-dominant variant.

Methods

The study took place in Wellington, New Zealand, from 7-February to 2-October 2022. When an individual had a confirmed case of SARS-CoV-2, all household members were instructed to take a swab every 3rd day until two consecutive negative swabs were obtained from the last person with SARS-CoV-2. Participants were monitored daily for acute respiratory symptoms until no further symptoms.

Results

We enrolled 75 households with confirmed cases of SARS-CoV-2 (total enrolled individuals = 306). The median serial interval was 4 days, and the secondary attack rate (SAR) was 60.6 % (95 % confidence interval (CI) 54.1–66.7). The SAR was higher for older household contacts and lower for contacts of fully vaccinated index cases. The SAR was highest when both the index case and the contacts were unvaccinated or received only one vaccine dose (88 %).

Conclusions

In this household cohort, the SARS-CoV-2 Omicron variant showed a high SAR which was modifiable by vaccination; the vaccination status of the index case and household members significantly reduced this.
{"title":"Household transmission of the SARS-CoV-2 omicron variant in New Zealand, 2022","authors":"Nayyereh Aminisani ,&nbsp;Q. Sue Huang ,&nbsp;Lauren Jelley ,&nbsp;Timothy Wood ,&nbsp;Tineke Jennings ,&nbsp;Danielle Currin ,&nbsp;Ruth Seeds ,&nbsp;Maritza Marull ,&nbsp;Amanda Kvalsvig ,&nbsp;Michael G. Baker ,&nbsp;Nhung Nghiem ,&nbsp;Paul G. Thomas ,&nbsp;Richard J. Webby ,&nbsp;The SHIVERS investigation team","doi":"10.1016/j.jvacx.2025.100638","DOIUrl":"10.1016/j.jvacx.2025.100638","url":null,"abstract":"<div><h3>Background</h3><div>Studying the transmissibility of the SARS-CoV-2 and its driving factors is valuable due to the ongoing emergence of new variants. We examined the household transmission characteristics of the Omicron-dominant variant.</div></div><div><h3>Methods</h3><div>The study took place in Wellington, New Zealand, from 7-February to 2-October 2022. When an individual had a confirmed case of SARS-CoV-2, all household members were instructed to take a swab every 3rd day until two consecutive negative swabs were obtained from the last person with SARS-CoV-2. Participants were monitored daily for acute respiratory symptoms until no further symptoms.</div></div><div><h3>Results</h3><div>We enrolled 75 households with confirmed cases of SARS-CoV-2 (total enrolled individuals = 306). The median serial interval was 4 days, and the secondary attack rate (SAR) was 60.6 % (95 % confidence interval (CI) 54.1–66.7). The SAR was higher for older household contacts and lower for contacts of fully vaccinated index cases. The SAR was highest when both the index case and the contacts were unvaccinated or received only one vaccine dose (88 %).</div></div><div><h3>Conclusions</h3><div>In this household cohort, the SARS-CoV-2 Omicron variant showed a high SAR which was modifiable by vaccination; the vaccination status of the index case and household members significantly reduced this.</div></div>","PeriodicalId":43021,"journal":{"name":"Vaccine: X","volume":"24 ","pages":"Article 100638"},"PeriodicalIF":2.7,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sex and gender differences in response to vaccines: Unveiling the biological and societal factors shaping immunity 对疫苗反应的性别差异:揭示影响免疫力的生物和社会因素
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-04-03 DOI: 10.1016/j.jvacx.2025.100637
Anna Ruggieri, Simona Anticoli
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引用次数: 0
University Students' understanding of masking policies and their mask use in relation to COVID-19 vaccination history, both in and out of the classroom, during the pandemic, 2022–2023
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-03-26 DOI: 10.1016/j.jvacx.2025.100636
Linda S. Gutierrez , Kate S. Brien , Walter Faig , Carmelita Whitfield , Susannah Anderson , Sarah Bauerle Bass , Stella Winters , Charlotte A. Moser , Barbara J. Kuter

Background

This study aimed to identify masking behaviors in and out of the classroom and knowledge of masking policies in relationship to COVID-19-vaccination among university students during the COVID-19 pandemic in 2022–2023.

Methods

A total of 2223 students at four universities in Pennsylvania completed a survey in the spring of 2023 on masking requirements at their schools, when they wore a mask (in and outside of the classroom), their COVID-19 vaccination history, and their likelihood of continuing to mask during their in-person classes in the future.

Results

Masking in class was not required at the universities during the 2022–2023 academic year; two schools allowed instructors to determine masking policies for their classes. At schools with no masking requirement, 46.2 % of students in fall 2022 and 62.1 % of students in spring 2023 correctly reported there was no requirement. In fall 2022, 50 % of students reported they did not wear a mask during class; the rate rose to 76 % during spring 2023. Outside of class, 52 % indicated they wore a mask in healthcare facilities, 44 % wore a mask when they thought they might be sick, 30 % reported masking when required outside of class or when in large crowds, and 18 % indicated they never wore a mask outside of class. Students who masked reported receiving more doses of COVID-19 vaccine compared with students who never masked. Students who planned to continue to mask, regardless of university requirements, tended to be non-White, non-male, and up-to-date on COVID-19 vaccinations.

Conclusions

Masking behavior among university students varied by semester, location (in or out of the classroom), perceptions of their university's masking policy and COVID-19 vaccination status. These findings provide perspective on student behaviors around masking as an important public health measure and may inform students' likelihood of adhering to masking recommendations in future outbreaks or pandemics.
{"title":"University Students' understanding of masking policies and their mask use in relation to COVID-19 vaccination history, both in and out of the classroom, during the pandemic, 2022–2023","authors":"Linda S. Gutierrez ,&nbsp;Kate S. Brien ,&nbsp;Walter Faig ,&nbsp;Carmelita Whitfield ,&nbsp;Susannah Anderson ,&nbsp;Sarah Bauerle Bass ,&nbsp;Stella Winters ,&nbsp;Charlotte A. Moser ,&nbsp;Barbara J. Kuter","doi":"10.1016/j.jvacx.2025.100636","DOIUrl":"10.1016/j.jvacx.2025.100636","url":null,"abstract":"<div><h3>Background</h3><div>This study aimed to identify masking behaviors in and out of the classroom and knowledge of masking policies in relationship to COVID-19-vaccination among university students during the COVID-19 pandemic in 2022–2023.</div></div><div><h3>Methods</h3><div>A total of 2223 students at four universities in Pennsylvania completed a survey in the spring of 2023 on masking requirements at their schools, when they wore a mask (in and outside of the classroom), their COVID-19 vaccination history, and their likelihood of continuing to mask during their in-person classes in the future.</div></div><div><h3>Results</h3><div>Masking in class was not required at the universities during the 2022–2023 academic year; two schools allowed instructors to determine masking policies for their classes. At schools with no masking requirement, 46.2 % of students in fall 2022 and 62.1 % of students in spring 2023 correctly reported there was no requirement. In fall 2022, 50 % of students reported they did not wear a mask during class; the rate rose to 76 % during spring 2023. Outside of class, 52 % indicated they wore a mask in healthcare facilities, 44 % wore a mask when they thought they might be sick, 30 % reported masking when required outside of class or when in large crowds, and 18 % indicated they never wore a mask outside of class. Students who masked reported receiving more doses of COVID-19 vaccine compared with students who never masked. Students who planned to continue to mask, regardless of university requirements, tended to be non-White, non-male, and up-to-date on COVID-19 vaccinations.</div></div><div><h3>Conclusions</h3><div>Masking behavior among university students varied by semester, location (in or out of the classroom), perceptions of their university's masking policy and COVID-19 vaccination status. These findings provide perspective on student behaviors around masking as an important public health measure and may inform students' likelihood of adhering to masking recommendations in future outbreaks or pandemics.</div></div>","PeriodicalId":43021,"journal":{"name":"Vaccine: X","volume":"24 ","pages":"Article 100636"},"PeriodicalIF":2.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A mixed methods study protocol for CONFIVAC, an intervention to enhance paediatric nurses' and paediatricians' skills to promote vaccination and vaccine confidence
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-03-25 DOI: 10.1016/j.jvacx.2025.100635
Elisabet Henderson , Sara Valmayor , Victoria Porthé , Alba Asensio , Xavier Bruna , Usue Elizondo-Alzola , Anna Ramirez-Morros , Gemma Ricós , Josep Vidal-Alaball , M. Isabel Pasarín , Cristina Rius , Elena Roel , Elia Díez , CONFIVAC Research Group

Background

Vaccine hesitancy (VH), defined as the delay in acceptance or refusal of vaccination despite its availability, is a global health threat. Paediatric healthcare workers (PHCWs) are key in promoting vaccination but often feel unprepared to manage VH effectively. We developed CONFIVAC, an intervention designed to strengthen the knowledge, self-efficacy, and skills of PHCWs in improving childhood vaccination, addressing VH, and fostering a culture of immunization within primary care. This study protocol outlines the design, contents, planned implementation, and mixed-methods effectiveness evaluation of CONFIVAC.

Methods

We will conduct a two-arm parallel cluster randomised controlled trial including PHCWs from 74 paediatric primary healthcare teams from Catalonia, Spain. Paediatric teams will be randomly assigned to the intervention or control arm (standard care). PHCWs in the intervention arm will participate in the training program CONFIVAC, which includes 10 h of online learning and 2 h of in-person training featuring role-playing exercises. Grounded in health behaviour theories, the curriculum includes evidence-based strategies to improve vaccination uptake. It addresses key topics such as vaccine knowledge, communication strategies, and organizational tools to promote vaccination. Process evaluation will assess overall satisfaction, likelihood of recommending CONFIVAC, and applicability. Main effectiveness outcomes will include vaccine-promoting behaviours (presumptive communication, anticipation of upcoming vaccines, and explicitly recommending vaccination in VH cases) and self-perception of having sufficient training to handle VH. We will perform adjusted ordinal regression models using an intention-to-treat approach. Quantitative results will be triangulated with qualitative insights from focus groups of PHCWs in the intervention arm employing a phenomenological approach.

Discussion

CONFIVAC is expected to provide PHCWs with evidence-based knowledge, communication techniques, and organizational skills to address VH and promote vaccination. By enhancing their skills and confidence, we aim to improve vaccination uptake and streamline vaccine-related tasks in primary care settings.
Trial registration: ClinicalTrials ID: NCT06489236
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引用次数: 0
Exploring a promising vaccine candidate against Leishmania major: Insights from Gp63, LACK, TSA, LmSTI1and KMP11 antigens in BALB/c mice
IF 2.7 Q3 IMMUNOLOGY Pub Date : 2025-03-19 DOI: 10.1016/j.jvacx.2025.100633
Sama Rashidi , Effat Noori , Bahram Kazemi , Seyyed Javad Seyyed Tabaei , Gholamreza Hatam
Leishmaniasis, a significant health issue in tropical regions, is spreading due to the challenges in treatment and the absence of an effective vaccine. The development of an effective vaccine for Leishmania major is crucial. This study aimed to assess the protective effectiveness of “Leish21,” a DNA vaccine containing multiple epitopes, against cutaneous leishmaniasis caused by L. major in different groups of BALB/c mice. The Leish21 vaccine was successfully transfected into eukaryotic cells, and its expression was confirmed using RT-PCR. Following infection with L. major promastigotes, immunized mice with Leish21 + IL12 and Leish21 showed a significant reduction in lesion diameter compared to the control group. In conclusion, the Leish21 vaccine triggered a Th1 immune response, and the addition of IL12 enhanced its efficacy against L. major infection.
{"title":"Exploring a promising vaccine candidate against Leishmania major: Insights from Gp63, LACK, TSA, LmSTI1and KMP11 antigens in BALB/c mice","authors":"Sama Rashidi ,&nbsp;Effat Noori ,&nbsp;Bahram Kazemi ,&nbsp;Seyyed Javad Seyyed Tabaei ,&nbsp;Gholamreza Hatam","doi":"10.1016/j.jvacx.2025.100633","DOIUrl":"10.1016/j.jvacx.2025.100633","url":null,"abstract":"<div><div>Leishmaniasis, a significant health issue in tropical regions, is spreading due to the challenges in treatment and the absence of an effective vaccine. The development of an effective vaccine for <em>Leishmania major</em> is crucial. This study aimed to assess the protective effectiveness of “Leish21,” a DNA vaccine containing multiple epitopes, against cutaneous leishmaniasis caused by <em>L. major</em> in different groups of BALB/c mice. The Leish21 vaccine was successfully transfected into eukaryotic cells, and its expression was confirmed using RT-PCR. Following infection with <em>L. major</em> promastigotes, immunized mice with Leish21 + IL12 and Leish21 showed a significant reduction in lesion diameter compared to the control group. In conclusion, the Leish21 vaccine triggered a Th1 immune response, and the addition of IL12 enhanced its efficacy against <em>L</em>. <em>major</em> infection.</div></div>","PeriodicalId":43021,"journal":{"name":"Vaccine: X","volume":"24 ","pages":"Article 100633"},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Vaccine: X
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