By Marie Rosenthal, MS
In a unanimous decision, the FDA’s Vaccines and Related Biological Products Advisory Committee recommended the JN.1 and/or a specific JN.1-lineage strain should be used in the 2025-2026 formula for updated COVID-19 vaccines.
As SARS-CoV-2 circulates, it has been mutating with one strain after another becoming dominant. The delta strain became dominant in India in 2020, but by around May 2021, it was the dominant strain around the world. Delta was supplanted by