I've always understood however that the reason colds pass around far better in the winter is due to humidity. Humidity means water in the air, this water bonds with floating virus's and bacteria and drags it down to the ground etc. During the winter there is far less humidity and less "Air traffic" so to speak, so virus's and bacteria float around more freely.
Isn't this also a main reason they stick humidifiers in your room when your sick? Keeps other people from getting sick as easily. I mean there are obviously more then ONE factor to the cold season I'm sure.
Source: www.weather.com...
[edit on 28-4-2009 by Ciphor]



You are right that the body temperature rises to help
kill/fight the virus. Most viruses are actually fragile and dont last long outside of their peak environment. But that is basic knowledge in medicine.
You are wrong that people think fever is a warning sign. It does act in that way but your body is not literally saying to itself "OH # I BETTER GET
SOME HELP!" It is doing what years have told it kills the virus. Raise its temperature and attack it with the immune system. Great line of
thinking! 