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Why do we get sick?
When you've been in bed for two days clutching a bottle of cough medicine and a box of tissues, you know it's germs behind your misery. How do they do it?
IMMUNE SYSTEM
Inside your body, there is a mechanism designed to defend you from millions of bacteria, microbes, viruses, toxins and parasites. Find out the different components and how the human immune system works.
How much do you know about the human body?
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