Amid an ongoing surge, the U.S. Food and Drug Administration (FDA) has approved updated COVID-19 vaccines for the 2024-2025 respiratory disease season.
The new shots, made by Moderna and Pfizer-BioNTech, are largely the same as the original mRNA vaccines developed at the start of the pandemic—but they target KP.2, a different strain of the virus that has been causing many of the rising number of cases this summer. The FDA initially recommended in early June that vaccine makers target...