Germ filled world

I was catching minor colds, one strep throat and one laryngitis lately. Kids took advantage of those days when I couldn't talk, certainly couldn't be able to yell at them. I was frustrated at the reasons of my weak immune system. WH blamed me for taking showers in the gym. I said we needed an air purifier in our room (since John-John moved out from our room, purifier left with him). We don't know which is the real answer. All of them could probably be part of the problem. So, cocktail therapy is my solution:
no.1. come home to shower after workout;
no.2 purchase another air purifier (has to be good). They all claim themselves to be effective, can't decide yet.
no.3 sleep well
no.4 eat my daily vitamin
no.5 pray.
I think I am just growing old...