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11 kwi 2022 · As of 24 January 2022, 33 vaccines have been approved for use in 197 countries. In this review, we discuss the genetics, structure, and transmission methods of SARS-CoV-2 and its variants, highlighting how mutations provide enhanced abilities to spread and inflict disease.
2 dni temu · ECDC utilises three categories of variant classification to communicate increasing levels of concern about a new or emerging SARS-CoV-2 variant: variant under monitoring (VUM), variant of interest (VOI) and variant of concern (VOC).
23 cze 2021 · So far, there is no good evidence that currently identified variants of concern evade the most important vaccine effect — that of prevention of severe disease. Table 2 describes key...
31 sie 2022 · Challenges facing the Covid-19 vaccine field include inequitable vaccine distribution, vaccine hesitancy, waning immunity, and the emergence of highly transmissible viral variants that partially...
12 paź 2023 · The FDA, EMA, and World Health Organization (WHO) have recommended that COVID-19 vaccines should be updated again, for autumn 2023, and annual booster doses containing the newest variants may be recommended every year, similar to influenza virus vaccines. Which strain should be included?
6 lut 2021 · Pfizer has revealed that laboratory tests suggested that its vaccine would work against B.1.1.7. The studies have not been peer reviewed. Both companies have said that they are investigating booster shots to protect against variants of SARS-CoV-2.
24 mar 2021 · Four key concerns stemming from the emergence of the new variants are their effects on viral transmissibility, disease severity, reinfection rates (i.e., escape from natural immunity), and...
