There's an army inside of me?!

People sometimes wonder... what exactly is the immune system? Or, what does it do? Before you dismiss and banish that question into oblivion as quickly as it came, you need to take a peek in here first!
This is a short and easy read essay, for readers of all ages, which gives a general overview of a basic immune response. Included is an explanation for children as well as a non-pretentious explanation in plain English for adults. That way the next time you hear someone mentioning that same q...