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SVEN [57.7K]
4 years ago
5

What type of barrier are coughing and sneezing?

Biology
2 answers:
Mashutka [201]4 years ago
5 0
I would say physical though. 
Veseljchak [2.6K]4 years ago
4 0
Physical i think 
 
i hope this is what you are looking for.
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