Just lucky so far: There is no natural immunity to influenza. I would guess at least half of all people your age (20) have never had overt influenza, so this is nothing unusual. You have just been lucky so far. Either you never caught it, or you had mild symptoms; flu often is no worse than a common cold. Your luck will run out one day. You still should have recommended influenza vaccine every year.
Answered 2/1/2017
3k views
A doctor has provided 1 answer
5 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question