FDA picks a new strain for fall Covid vaccines. Here’s what it means for your next shot.

The FDA has recommended drugmakers update Covid vaccines to target the LP.8.1 strain, which is currently the dominant strain in the U.S., despite earlier advisory committee suggestions to maintain existing vaccine formulations. While updated vaccines for high-risk groups, such as adults 65 and older, are expected to be available this fall, new FDA rules may require placebo-controlled trials for healthy individuals, potentially delaying broader access. The shift in policy marks a new phase in the U.S. response to Covid, moving away from expedited approvals without updated trial data.