Pfizer to study shots targeting Omicron

Updated January 25 2022 - 11:01pm, first published 10:57pm
COVID-19 vaccine makers have been updating their shots to better match the Omicron variant.
COVID-19 vaccine makers have been updating their shots to better match the Omicron variant.

Pfizer has begun a study comparing its original COVID-19 vaccine with doses specially tweaked to match the hugely contagious Omicron variant.

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