Saluslibrorum, I think you could have a very good point here. Yeah, a lot of people appear clean here, but it may just be appearance. Another problem I can see happening also is the fact that when you work it is not very good to be off sick. Rather than take a couple of days off to clear even the most simple cold, people keep on going, so they get sick longer and they pass it on to anybody they get in contact with. If you are a bit run down yourself, you are bond to get it. The attitude there does not lay necessarily with the employees but with the bosses who think no matter what you should be at work, that is what you are paid for... So this winter if you hear about entire offices being "wiped out", I bet this is where you will find your answer to the problem. Businesses are very short sighted as far as the health of their staff and their own health is concerned.