mhook mhook
  • 10-07-2017
  • Health
contestada

What is the body's first line of defense against bacteria and viruses

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Аноним Аноним
  • 10-07-2017
The first line of defense is physical barriers
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mh21300 mh21300
  • 10-07-2017
Physical barriers such as your skin, and chemical barriers such as proteins that attack invaders in the body.
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