A member asked:

I had h2n3 during the 2012-2013 fu season. thats the sickest ive ever been. i get the flu shot early but does that mean i have some natural immunity?

3 doctors weighed in across 2 answers

Not immune: each year has a different strain of influenza.2012/13 likely has no connection to this year's flu.

Answered 1/24/2018

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Could be true.: You may have some level of immunity against the H2N3 variant based on your illness with that variant back in the 2012-2013 season. There’s a bit of cross-immunity which may provide you a bit of immunity against similar strains, too. But it’s always good to get vaccinated anyway to really be safe.

Answered 1/31/2018

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Could a person get flu twice during same season?

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