FDA advises Covid vaccine makers to target new contagious strain for fall shots

The FDA advised drugmakers to update Covid vaccines to target the KP.2 strain, a descendant of the highly contagious JN.1 variant that spread widely in the U.S. this winter.  NBC News Health

​The FDA advised drugmakers to update Covid vaccines to target the KP.2 strain, a descendant of the highly contagious JN.1 variant that spread widely in the U.S. this winter.