What are viruses? How do you bacteria and viruses help human health?

I don’t believe viruses help health because they kill host cells and damage the host organism. However, after you survive a virus your body builds up a defense and it is highly unlikely you will catch the same virus.

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.