A member asked:

Our body has strong immune system to fight with a number of foreign pathogen to prevent illness or desease. so why is it that we still become ill?

A doctor has provided 1 answer

Immune reaction: Part of getting ill is that viruses like influenza constantly mutate and evolve to get around the immune system. The other part of feeling ill is a consequence of reactions caused by the immune system while actually fighting infections!

Answered 10/15/2016

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