Question

What is the single effective most effective way to prevent infections? what are two additional ways to control the spread of germs that are spread through the air, such as colds?

Answer 1

The single most effective way to prevent infections is to keep your hands clean. This will prevent contracting and control the spreading of bacteria. Two additional ways to control the spread of germs would be to always put your hands over you mouth when you cough and sneeze, ideally sneeze into a tissue and dispose of it, and keep away from people who are sick.

Answer 2

Clean your hands.
Avoid close contact with people who are sick.
Stop the spread of germs:
Clean and disinfect surfaces or objects. (A disinfectant to kill the germs.)

(The best way to prevent the flu is to get a vaccine against the flu each season.)