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Prior Omicron infection protects against BA.4 and BA.5 variants

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Updates & Corrections

  • Correction 25 July 2022: An earlier version of this article said that researchers identified which infections were caused by BA.4 or BA.5 by searching for a protein that the subvariants lack. In fact, the protein is still present in BA.4 and BA.5 but contains a mutation.


  1. Altarawneh, H. N. et al. Preprint at medRxiv (2022).

  2. Chemaitelly, H. et al. Preprint at medRxiv (2022).

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