asked 184k views
1 vote
What type of barrier are coughing and sneezing?

asked
User Karlth
by
8.2k points

2 Answers

1 vote
physical i think

i hope this is what you are looking for.
answered
User Stefaan
by
8.1k points
2 votes
I would say physical though. 
answered
User Joyce
by
7.9k points

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