When your sick DO NOT GO TO THE GYM! It is seriously inconsiderate to everyone else. Why do you want to spread your virus/cold? Why do you want to make everyone else have to go through what your going through?
Stop being selfish...
If you have diarrhea, or your sick DO NOT GO IN THE POOL. You will spread it on to others. The chlorine in the pool doesn't kill everything immediately, some viruses can live up to 24 hours in the water before being killed by the chlorine.
I find this article to be self centered and inconsiderate... if your going to try these things do it at home in your equipment. Don't be selfish and show up and the GYM sick and spread it around...