I am rarely sick, despite often traveling on airplane with all those nasty, sick people coughing and sneezing.
Here is what I do:
Listen to Mom - wash your hands with soap and water.
Be like Howie - germaphobe Howie Mandel doesn’t shake people’s hands, he bumps fists. He won’t touch a doorknob or a light switch. I operate the faucet and open the door to a public bathroom with a paper towel.
I also take Superfood and Flameout everyday, along with Emerg-n-C.
If I think I am starting to get a cold or have been exposed to someone who is sick, I use one of those zinc nasal sprays and massive doses of vitamin C.
Hope this helps…