Get lots of sleep, eat lots of chicken soup, and avoid the maddening crowd is my advice for staying healthy.
May I add:
Wash your hands.
Decontaminate doorknobs and light switches around the house (don’t forget mailbox, faucet, toilet & fridge handles)
Then there’s your tv remote and video game controllers
Definitely avoid public restrooms & shopping carts & library books.
Scalding water & bleach (as well as being standoffish to nosy neighbors) are your friends....
Not that I obsess over these things.....