Question: How do viruses and diseases get into a hospital and then get into people and how can this be prevented?

Michael Loughlin answered on 18 Jun 2010:

well viruses and bacteria are all over the place , on us, in us, around us so it can’t really be prevented

our bodies have loads of systems to prevent access to microbes..nose hairs filter them out, cells in our lungs push them back out like body surfing at a rock gig until we then cough them out, loads of immune cells sawallow and kill them and of course our marvellous skin provides a barrier to them ever getting in..
when these systems break down thats when they can get in. Thast why we don’t get inflammation on out hands becase bacteria are on the skin…we only get it when that skin is breached.
by hygines and trying to reduce the bacteria in hospitals we can lessen the dose people get, and so reduce the chance for disease…but it can never be completely prevented