It starts working where the flu typically enters the body

The flu spreads when tiny, flu-filled droplets are released by an infected person and breathed in

  • These droplets are released by coughing, sneezing, or talking
  • They can travel up to 6 feet through the air

The flu typically enters your body through your nose, so it's important to help fight the flu virus there

  • One spray of FluMist Quadrivalent in each nostril can help protect eligible children and adults ages 2-49

It is engineered to PROTECT—NOT INFECT

Similar to other live vaccines, like the chicken pox vaccine, FluMist Quadrivalent contains a weakened live virus

The weakened live virus is designed not to cause the flu, but to help protect you from the flu

  • To cause illness in others, a live vaccine virus would need to replicate, and then revert to “wild-type influenza”
  • It would take more than 1,000 years for a live virus strain to revert to wild-type influenza

FluMist Quadrivalent triggers an immune response in the nose—the place where you usually catch the flu

  • It then triggers your immune system to build defenses (called antibodies) throughout the body to help fight against the flu virus
  • This is how FluMist Quadrivalent can help prevent you from getting the flu

It helps build immunity against the flu in 3 ways


In your nose,
where the flu
typically starts


In your bloodstream


In your cells,
to help build up
resistance to infection

How it is administered

  • Administered by a healthcare professional
  • 1 spray in each nostril
  • You don't need to sniff. You can breathe normally while you get FluMist Quadrivalent
  • It's okay if you sneeze, blow your nose, feel dripping down your nose or throat, or swallow after receiving FluMist Quadrivalent. You still get an effective dose