Well, it’s not only us that get sick. Thousands of other animals, birds, plants, insects, and even bacteria, get sick, too.
In the first place, a virus can’t do anything to harm anything unless it is inside a cell. As long as it is outside of a cell, on any surface, floating in the air, in the water, on your kitchen counter, or your own skin, or inside your intestine, it can’t do you any harm.