Prognosis
Omicron’s Mutations Impaired Vaccine Effectiveness, CDC Says
- 40% of hospitalizations during BA.2 were vaccinated, boosted
- Waning immunity and Covid’s frequent mutations play a role
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Almost 40% of people hospitalized in the US with the Covid subvariant that circulated this spring were vaccinated and boosted, highlighting how new strains have mutated to more readily escape the immunity offered by current shots.
The findings from scientists at the US Centers for Disease Control and Prevention underscore the importance of having Covid shots that are better at targeting omicron subvariants.