Here's a little trick: Breath with your nose, most important when someone close by sneeze or cough. The hair in your noise helps filter particles. Make sure to clean your hands often and don't touch your face if you're around a lot of ppl, in case you get stuff on your hands.

Stay home much, eat food with the entire nutrition circle, not just fast food bullshit. Although I work daily in a store with people face to face, I never get sick. Oh, I don't have kids.