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FluMist, Influenza Virus Vaccine Live

MedImmune LLC · Phase 2 active Biologic

FluMist, Influenza Virus Vaccine Live is a Live attenuated influenza vaccine Biologic drug developed by MedImmune LLC. It is currently in Phase 2 development for Influenza prophylaxis in children and adults aged 2-49 years.

FluMist is a live attenuated influenza vaccine that replicates in the nasal mucosa to stimulate local and systemic immune responses against influenza viruses.

FluMist is a live attenuated influenza vaccine that replicates in the nasal mucosa to stimulate local and systemic immune responses against influenza viruses. Used for Influenza prophylaxis in children and adults aged 2-49 years.

At a glance

Generic nameFluMist, Influenza Virus Vaccine Live
SponsorMedImmune LLC
Drug classLive attenuated influenza vaccine
ModalityBiologic
Therapeutic areaImmunology
PhasePhase 2

Mechanism of action

The vaccine contains weakened (attenuated) strains of influenza A and B viruses that are temperature-sensitive and can replicate efficiently in the cooler upper respiratory tract but not in the warmer lower respiratory tract or systemic circulation. This replication triggers both mucosal IgA antibodies and systemic immune responses, providing protection against influenza infection. The live attenuated approach mimics natural infection more closely than inactivated vaccines, potentially generating broader and more durable immunity.

Approved indications

Common side effects

Key clinical trials

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results

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Frequently asked questions about FluMist, Influenza Virus Vaccine Live

What is FluMist, Influenza Virus Vaccine Live?

FluMist, Influenza Virus Vaccine Live is a Live attenuated influenza vaccine drug developed by MedImmune LLC, indicated for Influenza prophylaxis in children and adults aged 2-49 years.

How does FluMist, Influenza Virus Vaccine Live work?

FluMist is a live attenuated influenza vaccine that replicates in the nasal mucosa to stimulate local and systemic immune responses against influenza viruses.

What is FluMist, Influenza Virus Vaccine Live used for?

FluMist, Influenza Virus Vaccine Live is indicated for Influenza prophylaxis in children and adults aged 2-49 years.

Who makes FluMist, Influenza Virus Vaccine Live?

FluMist, Influenza Virus Vaccine Live is developed by MedImmune LLC (see full MedImmune LLC pipeline at /company/medimmune-llc).

What drug class is FluMist, Influenza Virus Vaccine Live in?

FluMist, Influenza Virus Vaccine Live belongs to the Live attenuated influenza vaccine class. See all Live attenuated influenza vaccine drugs at /class/live-attenuated-influenza-vaccine.

What development phase is FluMist, Influenza Virus Vaccine Live in?

FluMist, Influenza Virus Vaccine Live is in Phase 2.

What are the side effects of FluMist, Influenza Virus Vaccine Live?

Common side effects of FluMist, Influenza Virus Vaccine Live include Nasal congestion, Runny nose, Sore throat, Cough, Fever, Headache.

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