Prevent sars-cov-2 illness?

Basically 2 things: Social distancing and face mask. Those are 2 things everybody can do. Other preventive measures also can be taken depending on locations and circumstances such as wiping the groceries, using hand sanitizers or washing the hands frequently etc.

Prevention: Wash hands often with warm water & soap for at least 20 seconds. Avoid touching eyes, nose or mouth unless hands have just been washed. Use a face covering or mask when in public. Practice social distancing – stay at least 6 feet from others (outside of family you live with). Stay away from crowds. Stay home as much as possible. Eat healthfully & sleep adequate amounts.