What are most upper respiratory illnesses caused by? O bacteria O allergies O viruses mucus

asked Apr 8, 2022 140k views

5 votes

What are most upper respiratory illnesses caused

by?
O bacteria
O allergies
O viruses
mucus

6.7k points

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2 votes

The most upper respiratory illnesses are caused by bacteria

Chong Luo answered Apr 9, 2022

7.1k points

0 votes

Answer:

virus

Step-by-step explanation:

Qarl answered Apr 12, 2022

by Qarl

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