Q. How are infectious diseases, such as colds and influenza, most commonly spread?

A
Breathing viruses in air
B
Hand-to-face contact
C
Drinking infected water
D
Eating contaminated food
Solution:

Hand-to-face contact .

The most common way to catch infectious illnesses is to touch the mouth, nose, or eyes with hands that are contaminated with germs such as virus or bacteria, says the Centers for Disease Control and Prevention (CDC).

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