Ask the Doctors

How come the flu shot was ineffective?

I just read that the flu vaccine this year was not effective. What happened? I had my flu shot this year. But I am reluctant to get again next time.

To continue reading this article you must be registered.

Get Licensed Content to Harvard Health

If you are interested in licensing content from Harvard Health Publications, please contact us using our online form. Our licensing and business development professionals will help you leverage consumer health content from Harvard Medical School as a clear differentiator in helping achieve your business goals.

Contact Us

Customer Log In