Moderna's Combo Flu and COVID Shot Shows Promise

THURSDAY, May 8, 2025 (HealthDay News) — A new vaccine that combines flu and COVID-19 protection in one shot shows promising results, but the U.S. Food and Drug Administration (FDA) says it wants more data before it can be approved.

Moderna researchers reported that the combo shot produced a stronger immune response against COVID-19 and most flu strains than the individual vaccines already on the market.

The results were published May 7 in the Journal of the American Medical Association.

The study focused on adults ages 50 and older and included 8,015 participants. Common side effects included pain at the injection site, fatigue and headaches, The Associated Press reported.