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Vaccines protect against infection from Omicron subvariant — but not for long

Two doses of COVID vaccine cut the risk of infection and mild illness from the rising BA.2 subvariant, although protection wanes quickly.
  1. Saima May Sidik
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The Omicron subvariant BA.2 is replacing its sister version, BA.1, as the dominant form of SARS-CoV-2 in many countries, which has led scientists to wonder whether the COVID-19 pandemic is about to throw these regions into disarray yet again. But a study1 published on 13 March shows that mRNA vaccines offer a similar degree of protection against the two strains — although protection against SARS-CoV-2 infection and symptomatic disease wanes within months of a third dose.

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doi: https://doi.org/10.1038/d41586-022-00775-3

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