Keep your hands away from your nose, eyes, and mouth. These are the places where viruses are most likely to enter your body.
Do not smoke or use other tobacco products. Smoking irritates the mucous membranes of the nose, sinuses, and lungs, which may make them more susceptible to infections. For more information, see the topic Quitting Smoking.
If you live in an area that has problems with air pollution or smoke from wildfires:
Stay indoors and avoid breathing in smoke, ashes, or polluted air.
Do not exercise outdoors if you smell smoke or notice irritation of your eyes, nose, or throat.
Keep your motor vehicle windows rolled up and the vents closed when driving.
Avoid cleanup activities, such as raking leaves or cutting brush.
Avoid exposure to chemicals. Do not spray or apply chemicals unless you are wearing protective clothing, such as a particle-filtering respirator, safety goggles, and gloves.