![Moderna working on combination COVID-19 vaccine booster and flu shot](/upload2/fbig/2021-09-10/1631257473613b038105e646.00225254.jpeg)
Moderna working on combination COVID-19 vaccine booster and flu shot
Moderna Inc said it is developing a single vaccine that combines a booster dose against COVID-19 with its experimental flu shot. The company hopes to eventually add vaccines it is working on for respiratory syncytial virus (RSV) and …