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21 March, 00:48

What is the body's first line of defense against bacteria and viruses? saliva, mucus, and hairs antibodies lymphocytes lymph nodes

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Answers (2)
  1. 21 March, 02:01
    0
    Well your skin is the first line of defense
  2. 21 March, 03:56
    0
    It's mucus
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