asked 140k views
5 votes
What are most upper respiratory illnesses caused

by?
O bacteria
O allergies
O viruses
mucus

2 Answers

2 votes
The most upper respiratory illnesses are caused by bacteria
answered
User Chong Luo
by
8.5k points
0 votes

Answer:

virus

Step-by-step explanation:

answered
User Qarl
by
8.3k points
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