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COVID-19: bivalent vaccine less effective against Omicron infection

Miriam Davis, PhD   |   Clinical Summary   |   09 January 2023
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Takeaway

  • The bivalent mRNA vaccines are only about 30% effective against SARS-CoV-2 infection at a time when the Omicron BA.4/BA.5 lineages were the dominant strains, according to a retrospective cohort study of health care workers posted on the pre-peer review server medRxiv .

Why this matters

  • The bivalent mRNA vaccines (made by...

          

Topic Challenges

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