lieshaperez16
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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