Childhood flu, birth year predicts immunity in adulthood
Norrmally, our body is well equipped to deal with influenza; our immune system can ward off infections, causing no more than a few days of discomfort. However, once every few decades, a new strain of rapidly spreading influenza emerges. New research suggests that should such a pandemic occur, we may be able to predict our chances of survival based on the year we were born in and the flu we were exposed to as children....

http://www.medicalnewstoday.com/articles/314037.php
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