How does the immune system protect our body from diseases? Mention the 3 lines of defenses

asked Feb 11, 2018 23.8k views

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The system make a wall and what ever gets pass it dies but not all of it dies that is how we get sick

Brettb answered Feb 15, 2018

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asked Jul 12, 2021 12.6k views

Princeyesuraj asked Jul 12, 2021

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