Data released by Moderna today shows some promising results on the combined COVID and flu shot. 

In clinical trials, the shot produced a higher immune response in older adult than separate vaccines for those viruses given together. 

But it will take until at least the fall of 2025 for the combined vaccine to hit the market. 

To find out more, KCBS Radio anchors Bret Burkhart and Patti Reising were joined by Dr. John Swartzberg, Clinical Professor of Infectious Diseases at UC Berkeley School of Public of Health.

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