Your best bet is to wash your hands often with soap and warm water, and to avoid touching your face – especially your eyes, nose, and mouth. This will keep the germs off your hands and keep them from getting into your system in the first place.
I work in a hospital with very sick people but I don’t get sick b/c I am meticulous about hand washing!
Lots of fluids, vitamin C, regular exercise, fruits, vegetables, good clean food.
Ever notice most gym rats and health fanatics never get sick ?
Healthy = illness resistance.
I haven’t been sick in almost 8 years.