4 doctors weighed in:
Got flu this year even if though got the flu shot?
4 doctors weighed in

Dr. Martin Raff
Internal Medicine - Infectious Disease
3 doctors agree
In brief: Not unusual
Influenza vaccine contains the strains of the virus most commonly in circulation at the beginning of the year. The virus mutates (drifts), and so you may have only partial protection, you may have been infected with a different strain, with influenza b, or with a completely different virus which resembles influenza (parainfluenza, adenovirus, etc.
).

In brief: Not unusual
Influenza vaccine contains the strains of the virus most commonly in circulation at the beginning of the year. The virus mutates (drifts), and so you may have only partial protection, you may have been infected with a different strain, with influenza b, or with a completely different virus which resembles influenza (parainfluenza, adenovirus, etc.
).
Dr. Martin Raff
Dr. Martin Raff
Thank
Get help from a real doctor now
Dr. Arnon Rubin
Board Certified, Internal Medicine
20 years in practice
162K people helped
Continue
107,000 doctors available
Read more answers from doctors