Germs, Work, Dogs, School, Age

How Immune Systems Work

Alex Danco | 23rd March 2020

The human body defends itself against infection using three main lines of defence. First there is the physical barrier of the skin, which keeps out 99% of biological threats. Second is the “innate” immune system, an evolved defence against known pathogens, which takes care of 99% of germs that get throu…

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