Scientists are working on combo flu and COVID-19 shot, but don't expect one this fall

With more scientists predicting COVID-19 boosters will be needed each year, some are now working on combining those with the annual flu vaccine. The idea, experts say, is a single injection given each fall that protects against seasonal flu and COVID-19. Pharmaceutical companies Moderna and Novavax have already announced plans to work on a combo shot, but don't expect them to be available this upcoming flu season. Instead, Moderna's CEO saying a combo shot could be ready by 2023.