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Get the facts

Read below to get to know more about FLUMIST QUADRIVALENT.

FACT: FLUMIST QUADRIVALENT is designed not to cause the flu.

Like the vaccines for chicken pox and measles, FLUMIST QUADRIVALENT is a live vaccine. That means it contains weakened live viruses. It stimulates the immune system in the lining of the nose and throat. That is where the flu virus typically enters the body.

FACT: The risk of getting infected with vaccine virus after close contact with a person vaccinated with FLUMIST QUADRIVALENT is extremely low.

To cause illness in others, a live vaccine would first need to replicate within the vaccinated person, and then revert to “wild-type influenza” before being transmitted to another person. And it would take more than 1,000 years for the live virus strains in FLUMIST QUADRIVALENT to revert to wild-type influenza.

FACT: People with weakened immune systems are not eligible for FLUMIST QUADRIVALENT.

But others who are in close contact with certain immunocompromised people may still be eligible. The Centers for Disease Control and Prevention (CDC), American Academy of Pediatrics (AAP), and the Society for Healthcare Epidemiology of America (SHEA) make recommendations for these circumstances.

For example, if you are in contact with someone who has HIV or is receiving chemotherapy, you may still get FLUMIST QUADRIVALENT. However, you should not get FLUMIST QUADRIVALENT if you are in close contact with someone with a severely weakened immune system, such as a person receiving stem cell transplants while they are in isolation.

FACT: People who get FLUMIST QUADRIVALENT can breathe normally during administration.

Sniffing is NOT necessary.

FACT: FLUMIST QUADRIVALENT was not studied in people with severe asthma or active wheezing.

Children younger than 5 years of age with recurrent wheezing and people of any age with asthma may be at increased risk of wheezing after getting FLUMIST QUADRIVALENT.

FACT: If you sneeze or need to blow your nose after you get vaccinated, you don’t need to get vaccinated again.

Dripping down the throat, sneezing, or swallowing sometimes happens after vaccination.

FACT: You can be vaccinated with FLUMIST QUADRIVALENT if you have a minor illness (eg, diarrhea or mild upper respiratory tract infection with or without fever).

However, if your nose is so congested that it might stop the vaccine from getting to the nasal lining, then you should wait until your nose is less congested or your doctor may suggest the injectable vaccine.

FACT: FLUMIST QUADRIVALENT does not contain mercury or any other preservatives or latex.


  • You should not get FLUMIST QUADRIVALENT if you have a severe allergy to eggs or to any inactive ingredient in the vaccine; have ever had a life-threatening reaction to influenza vaccinations; or are 2 through 17 years old and take aspirin or medicines containing aspirin—children or adolescents should not be given aspirin for 4 weeks after getting FLUMIST QUADRIVALENT unless your healthcare provider tells you otherwise
  • Children under 2 years old have an increased risk of wheezing (difficulty with breathing) after getting FLUMIST QUADRIVALENT
  • Tell your healthcare provider if you or your child are currently wheezing; have a history of wheezing if under 5 years old; have had Guillain-Barré syndrome; have a weakened immune system or live with someone who has a severely weakened immune system; have problems with your heart, kidneys, or lungs; have diabetes; are pregnant or nursing; or are taking a medication used to treat influenza like Tamiflu®*, Relenza®*, amantadine, or rimantadine
  • The most common side effects are runny or stuffy nose, sore throat, and fever over 100°F

FLUMIST QUADRIVALENT is a vaccine that is sprayed into the nose to help protect against influenza. It can be used in people 2 through 49 years old. FLUMIST QUADRIVALENT may not prevent influenza in everyone who gets vaccinated.

Please see accompanying full Prescribing Information, including Patient Information.

You may report side effects related to AstraZeneca products by clicking here.