How effective is the flu vaccine?

Dr. Lisa Fitzpatrick answers questions about the flu and the flu vaccine.

The flu vaccine is very effective, but it’s generally never a 100 percent. Some years the flu vaccine doesn’t always match the strain that’s circulating.

I tell people you should get the flu vaccine even if it’s not 100 percent effective is because it still has some activity to protect you against the flu. And even if you get the flu, it’s likely that it will be a lot less severe if you get a flu shot.

This information is shared for educational purposes only and should not be used as a substitute for professional medical advice. The views expressed are those of the featured medical professional and reflect information available to that professional at time of filming. Always consult a health care provider for any personal health decisions. Click here for vaccine FAQs from the CDC.

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