FDA Picks 2026–2027 COVID Vaccine Strain (XFG): What It Means for Fall
FDA has advised manufacturers to use an updated, monovalent 2026–2027 COVID-19 vaccine formula targeting a JN.1-lineage variant called XFG for use in fall 2026. Here’s what that “strain/formula” decision does—and what stays the same—plus practical steps for families using CDC’s risk-based vaccine guidance.
