New Covid Vaccines Targeting Variants Are Weighed for Fall Booster Campaign

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In preparation for a fall booster-shot campaign, advisers to the FDA will consider whether and how Covid-19 vaccines should be updated to better target circulating variants of the coronavirus

FDA advisers to consider recommending shots updated for Omicron or possibly sticking with original formulations

As fourth doses of Covid vaccines roll out, some are questioning whether the general population needs them. At the center of this debate are mysterious T-cells. WSJ’s Daniela Hernandez explains T-cells’ role in Covid immunity and how they relate to antibodies. Illustration: Laura Kammermann

 

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