lieshaperez16 lieshaperez16

20-07-2017
Biology

contestada

what type of barrier are coughing and sneezing?

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daguy42 daguy42

20-07-2017

I would say physical though.

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nicholasl142015 nicholasl142015

20-07-2017

physical i think

i hope this is what you are looking for.

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