About

Flu season is the yearly stretch of cold months when influenza outbreaks spread through a community, typically taking about two days after exposure for symptoms to appear and roughly three weeks to peak before fading. mFLUSIVA is an mRNA vaccine that delivers genetic instructions teaching the body's cells to make a piece of the influenza virus, so the immune system learns to recognize and attack it. Because that immune memory is built before exposure, the vaccine may help adults avoid getting sick when flu season arrives.