How effective is flu vaccine?

Answered by 1 Apollo Doctors

Dr Dhankecha Dineshbhai

General Practitioner

MBBS
6+ Yrs

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Every year, WHO studies the strains of influenza virus circulating globally and advise to produce the flu vaccine with those particular strains. Vaccine effectiveness may vary in relation to many factors globally but on a average, flu vaccination reduces the risk of influenza by 40 - 60 % among the overall population during seasons when most circulating flu viruses are well matched to the flu vaccine.

Answered 04/07/2025

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Effectiveness of the Inactivated Influenza Vaccine:
- The flu vaccine is generally effective in reducing the risk of flu infection and its complications, especially in healthy adults.
Variability of Effectiveness:
- Effectiveness can vary each year depending on how well the vaccine matches circulating flu strains.
Benefits Beyond Prevention:
- Even if the vaccine does not completely prevent the flu, it often reduces the severity and duration of illness.
Safety and Recommendations:
- The vaccine is safe for a healthy 30-year-old female and is recommended annually.
Additional Advice:
- Consult a healthcare provider for personalized advice and to get vaccinated annually for best protection.

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