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Define 1st, 2nd, 3rd, line of defense.
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Define 1st, 2nd, 3rd, line of defense.
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Jun 13, 2019
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Define 1st, 2nd, 3rd, line of defense.
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Hugo Vinhal
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First line:
mechanical, chemical and microbial
Second line: internal/non-specific, involves the immune system
Third line: internal/specific
MrKew
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Jun 17, 2019
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MrKew
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