U.S. FDA modifies strain recommendation for fall COVID vaccine amid variant shifts, increased cases

FDA modifies strain recommendation for fall COVID vaccine amid variant shifts, uptick in cases Though the US Food and Drug Administration (FDA) last week recommended that vaccine companies switch to the JN.1 variant for updated shots for the fall, yesterday it urged companies to focus on the KP.2 lineage if possible, based on recent shifts and a national rise in cases. CIDRAP

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In its latest variant proportion update, the Centers for Disease Control and Prevention (CDC) reported another jump in KP.3 proportions, along with a further rise in KP.2 viruses and a steady decline in the JN.1 parent lineage.

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