When will the 2026–27 flu vaccine types be officially announced?

The 2026–2027 flu vaccine types have not been officially announced, and will not be until early 2026.

No regulatory or manufacturer announcement has been made for that season. The evidence retrieved is empty, which is the answer. The WHO and FDA typically set the seasonal flu vaccine composition in February or March of the year the shot will be given. For the 2026–2027 northern hemisphere season, that means a public decision around February or March 2026.

Speculation about which platforms will be included (egg-based, cell-based, recombinant, or mRNA) is not evidence. mRNA flu vaccines from Moderna and Pfizer are in late-stage trials, but a trial candidate is not a licensed product. Whether any mRNA flu shot clears FDA licensure, secures manufacturing capacity, and gets selected for the seasonal composition by the advisory committees is unsettled. The previous answer stands: this is a question about a future regulatory event, and no public record answers it today.

My call: the official announcement will come in February or March 2026, but what it will say is unknown. Confidence: high on the timeline, not clear on the content.