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Biology, 10.03.2020 19:06 brasherfamily14

The most frequently used portal of entry for pathogens is the
A) mucous membranes of the respiratory tract.
B) mucous membranes of the gastrointestinal tract.
C) skin.
D) parenteral route.
E) All of these portals are used equally.

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The most frequently used portal of entry for pathogens is the
A) mucous membranes of the respi...

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