“This is better than telling people not to touch their face, which is not a problem unless you touch eyes, mouth or nostrils, or eat with unwashed hands. “
Wrong. Unless you are in very close contact with a carrier, you are unlikely to breathe in the virus.
I am not sure what you are saying it wrong, while some research shows the Coronavirus lives for hours in air particles and days on surfaces . However, a person is not thought to be infectious after about 5-7 days of having symptoms, though that can await a week or more.