Human Vaccines & Immunotherapeutics最新文献

S. pneumoniae serotypes responsible for pneumococcal disease differ with respect to disease severity, invasiveness, antimicrobial susceptibility, geographies, immunization history, age groups, and with time. Although PCVs have blunted the pneumococcal disease burden, they are plagued with numerous challenges, especially the emergence of NVTs. In this review, we show that there are diverse serotypes, especially NVTs, responsible for causing pneumococcal diseases in LMICs of South Asia across different studies conducted between 2012 and 2024. We propose that pharmaceutical/biotech companies should tailor/customize the PCVs as per the region-specific serotype prevalence based on surveillance data. Furthermore, protein-based vaccines, or WCVs, have been explored and can serve as viable alternatives to address the limitations associated with PCVs. However, robust studies are warranted in different geographies to demonstrate its efficacy and safety in clinical trials as well as the real-world effectiveness of these promising candidates.

In South Korea, the increasing incidence of herpes zoster (HZ) and aging population warrant consideration of HZ vaccination for older adults. There is a need to understand the HZ vaccine-related preferences of adults aged ≥50 years and adult children (working or financially independent adults contributing to healthcare decision-making for their parents aged ≥50 years). A discrete choice experiment was conducted to elicit HZ vaccine preferences of the HZ-naïve general public aged ≥50 years (n = 500), current/former HZ patients aged ≥50 years (n = 150), and adult children (n = 150). An online questionnaire was administered through March-May 2023; for each preference-elicitation question, respondents selected between three hypothetical HZ vaccine profiles, characterized by five attributes with varying levels, or "no vaccine". Respondents generally accepted an increased number of doses (from one to two) for a longer protection duration (from ≥4 to ≥7 or ≥10 years). By mean relative importance (RI), protection duration (RI: 37.1%; 95% confidence interval [CI]: 36.0%, 38.1%), lifetime HZ risk reduction (27.3%; 95% CI: 26.3%, 28.4%) and short-term side effects (14.9%; 95% CI: 14.1%, 15.6%) had the strongest impact on respondents' HZ vaccine decision-making. Adult children viewed short-term side effects with significantly greater RI than the general public and current/former HZ patients (19.1%, 13.5%, 15.2%, respectively, p < .001). Respondents with selected comorbidities placed higher RI than those without comorbidities on protection duration (39.3% versus 34.2%, p < .001) and lower RI on prevention of HZ-related complications (8.7% versus 10.4%, p = .007). Findings may guide health policy design/refinement and physician-patient conversations on HZ vaccination/vaccines.

Increasing the uptake of Human Papillomavirus (HPV) vaccine among adolescent girls is a high priority for the government of Bangladesh. This study examines correlates of HPV vaccine adoption in Dhaka Division, the largest division in Bangladesh. The 18-day vaccination campaign was accompanied by multimedia messages. We use the Fogg Behavior Model (FBM) as the theoretical framework for our analysis. Using a survey instrument based on the FBM, we analyze cross-sectional data collected from 611 caregivers of girls aged 9-17 in Dhaka. Survey data was collected in November and December 2023. Caregivers were recruited via Facebook and Instagram ads and interviewed through the Facebook Messenger App. About one-third of caregivers reported that their child had been vaccinated. We conducted bivariate and multivariate analyses to assess the relationships between the caregivers' motivation, ability, exposure to the campaign and their child's vaccination status. Adjusted odds ratios from logistic regression analyses, suggest that caregivers' motivation, ability, and exposure to the multimedia campaign contributed to vaccine uptake. Caregivers' motivation to get their child vaccinated was high (74%) but their ability was low (20%). Exposure to campaign messages had a dose-response relationship with vaccine adoption. However, 48% of caregivers remained unexposed to the multimedia campaign. We discuss challenges that the government's HPV vaccination program is likely to face and identify program-related research questions that are important to answer for the success of future vaccination efforts.

Pandemic-related disruptions in primary care delayed important discussions between providers and parents about routine vaccinations. Conversations have become even more challenging since the COVID-19 pandemic due to increased vaccine hesitancy. This qualitative study explored changes in human papillomavirus (HPV) vaccine conversations within the context of the pandemic from the perspective of primary care team members (PCTMs). Twenty-five PCTMs serving children between 9 and 17 y old in Pennsylvania during the pandemic were conveniently sampled. PCTMs rated their confidence and agreement related to HPV vaccine conversations and pandemic impact. Semi-structured interview questions assessed changes in their HPV vaccine conversations throughout the pandemic. Open-ended questions inquired about PCTMs' thoughts on the COVID-19 pandemic and if or how it impacted HPV vaccination uptake in their practice. Data were collected from May to July 2024. Verbatim transcriptions were analyzed using both inductive and deductive approaches to thematic analysis. Participants were 44% pediatricians, 50% had ≥20 y experience, and 68% were White. Six themes emerged: (1) parents show a range of reactions about HPV vaccination; (2) disruptions in healthcare visits and heightened parental concerns impede vaccination; (3) PCTMs notice clear changes in vaccine acceptance rates; (4) reasons for vaccination refusal have not substantially changed as a result of the pandemic; (5) importance of interpersonal relationships with parents; and (6) PCTM burnout impacts conversations. The pandemic added challenges to HPV vaccine conversations with parents. Findings from this study can be used to refine existing communication approaches to improve HPV vaccine conversations in primary care.

The effective implementation of vaccination heavily depends on the society's willingness to pay (WTP). There is currently a dearth of comprehensive evidence about WTP for vaccines in China. This systematic review aims to review studies on the WTP for vaccines, to summarize factors affect WTP in China. Base-case analysis and Sensitivity analysis of WTP for every vaccine were estimated via single-arm Bayesian meta-analysis. A total of 28 studies were included for systematic review. The point estimates and 95% Credible Interval of pooled WTP for influenza and HPV (9-valent) vaccine were $27.409 (23.230, 31.486), $464.707 (441.355, 489.456). Influencing factors to WTP were age, income, peer influence, health condition and etc. Future research should give focus to improving sample representativeness and survey tool, conducting intervention trials, identifying effective methods to promote WTP.

Vaccination is the most effective measure to prevent Chlamydia infection. However, to date, no vaccine has successfully completed the rigorous clinical trial process and gained regulatory approval for use in clinical practice. Scholars have been working on a safe and effective Chlamydia vaccine. In order to better grasp, the global frontiers and development trends in this field, a comprehensive bibliometric analysis was carried out. A total of 234 publications closely regarding Chlamydia vaccines were culled from the Web of Science Core Collection database, and the bibliometric information was then extracted with CiteSpace and VOSviewer software. After measurement analysis, the most influential papers were identified in this area, including highly cited papers, references with strong citation burst, and high co-citated papers. Vaccine has published the most literature on Chlamydia vaccines. Only scholars from 39 countries/regions have been engaged in studying Chlamydia vaccines. The USA is the most prolific country and has the highest collaborative strength. The current research area has focused on protective immunity and immunopathological response. Major outer membrane protein (MOMP) is the most common target vaccine antigen. This study reveals the status of literature and highlights emerging trends in this field, which helps researchers seek insights into this area and serve as a reference guide for further investigations.

Since 2019, there has been a growing focus on mRNA vaccines for infectious disease prevention, particularly following the emergence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). mRNA vaccines offer advantages such as rapid production and the ability to induce robust cellular and antibody responses, which are essential for combating infections that require cell-mediated immunity, including Tuberculosis (TB). This review explores recent progress in TB mRNA vaccines and addresses several key areas: (1) the urgent need for new TB vaccines; (2) current advancements in TB vaccine development, and the advantages and challenges of mRNA technology; (3) the design and characteristics of TB mRNA vaccines; (4) the immunological mechanisms of TB mRNA vaccines; (5) manufacturing processes for TB mRNA vaccines; and (6) safety and regulatory considerations. This interdisciplinary review aims to provide insights for researchers working to address critical questions in TB mRNA vaccine development.

Achieving safe influenza vaccination coverage among pregnant and breastfeeding women is a global health goal due to the potential risks of serious influenza for both mother and child. However, vaccine hesitancy remains a significant barrier to vaccination uptake. Since anxiety represents a determinant in vaccine decision-making, this study aimed to assess influenza vaccination hesitancy and anxiety levels in this population and to explore the association between women's characteristics, their reluctance, and anxiety levels. A multicentre, cross-sectional study was conducted between February and June 2022 using structured phone interviews to assess: (1) socio-demographics and clinical history; (2) anti-flu vaccination status, previous anti-flu vaccination, and Sars-CoV-2 infection history; (3) insights into influenza vaccination during pregnancy; (4) attitudes toward anti-flu vaccination, using the Vaccination Attitudes Examination (VAX) Scale; (5) anxiety levels, measured by the Self-Rating Anxiety Scale (SAS). Among the 387 participants, 22.8% were already vaccinated or expressed willingness to be vaccinated against influenza, and 54% had an anxiety disorder. While anxiety was not significantly associated with vaccine hesitancy, ongoing pregnancy emerged as an independent predictor of anxiety. Higher educational levels, ongoing pregnancy, already being vaccinated or willingness to get vaccinated, and being employed were associated with reduced vaccine hesitancy, while prior SARS-CoV-2 infection with increased hesitancy. Fear of unpredictable events and lack of healthcare professionals' recommendations emerged as reasons for vaccine reluctance. Given the low coverage rates, these findings highlight the need for health services to enhance vaccination efforts and provide clear recommendations to counter misinformation and ensure accurate vaccine safety information.

Human papillomavirus (HPV) vaccination could reduce HPV infection in men who have sex with men (MSM), but the published statistics on HPV vaccination uptake in MSM were scarce globally. This study estimated the uptake and profiled the service preferences of HPV vaccination of Chinese MSM in Hong Kong. Adult MSM were recruited through non-governmental organizations (NGOs) and online channels for completing an online baseline survey. Factors associated with self-reported history of HPV vaccination were identified using multivariable stepwise logistic regression model. Totally 701 Chinese MSM completed the online baseline survey, with the median age of 30 y (interquartile range [IQR] 26-35, range 18-67), and 23% of them had received HPV vaccination. More than half of vaccinated MSM (72%) rated convenient or very convenient for local HPV vaccination services. Among unvaccinated MSM, 50% considered high cost of HPV vaccine as the barrier of vaccination, 67% expressed willingness to pay below USD 128 per vaccine dose, and 65% preferred receiving vaccination in private clinics. MSM who had taken HIV pre-exposure prophylaxis (PrEP) (p < .001), had been tested for HPV (p = .018), and had (p = .005) multiple regular sex partners in the past 6 months were more likely to be vaccinated. The HPV vaccination uptake of Chinese MSM in Hong Kong remains low (23%), and high HPV vaccine cost is the main barrier. Preventive behaviors (HIV PrEP use and HPV testing) and high-risk sexual behavior (multiple regular sex partners) are potential targets for intervention to increase the uptake of HPV vaccination in MSM.