{"title":"COVID-19: Challenges of Viral Variants.","authors":"Jana L Jacobs, Ghady Haidar, John W Mellors","doi":"10.1146/annurev-med-042921-020956","DOIUrl":null,"url":null,"abstract":"<p><p>The COVID-19 pandemic has been accompanied by SARS-CoV-2 evolution and emergence of viral variants that have far exceeded initial expectations. Five major variants of concern (Alpha, Beta, Gamma, Delta, and Omicron) have emerged, each having both unique and overlapping amino acid substitutions that have affected transmissibility, disease severity, and susceptibility to natural or vaccine-induced immune responses and monoclonal antibodies. Several of the more recent variants appear to have evolved properties of immune evasion, particularly in cases of prolonged infection. Tracking of existing variants and surveillance for new variants are critical for an effective pandemic response.</p>","PeriodicalId":8056,"journal":{"name":"Annual review of medicine","volume":null,"pages":null},"PeriodicalIF":15.1000,"publicationDate":"2023-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"29","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annual review of medicine","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1146/annurev-med-042921-020956","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MEDICINE, RESEARCH & EXPERIMENTAL","Score":null,"Total":0}
引用次数: 29
Abstract
The COVID-19 pandemic has been accompanied by SARS-CoV-2 evolution and emergence of viral variants that have far exceeded initial expectations. Five major variants of concern (Alpha, Beta, Gamma, Delta, and Omicron) have emerged, each having both unique and overlapping amino acid substitutions that have affected transmissibility, disease severity, and susceptibility to natural or vaccine-induced immune responses and monoclonal antibodies. Several of the more recent variants appear to have evolved properties of immune evasion, particularly in cases of prolonged infection. Tracking of existing variants and surveillance for new variants are critical for an effective pandemic response.
期刊介绍：
The Annual Review of Medicine, which has been published since 1950, focuses on important advancements in diverse areas of medicine. These include AIDS/HIV, cardiology, clinical pharmacology, dermatology, endocrinology/metabolism, gastroenterology, genetics, immunology, infectious disease, neurology, oncology/hematology, pediatrics, psychiatry, pulmonology, reproductive medicine, and surgery. The journal's current volume has transitioned from a gated access model to an open access model through the Annual Reviews' Subscribe to Open program. All articles published in the journal are now available under a CC BY license.
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