Loring Wirbel provides good commentary on the current state of the war on germs and disease.  If people would just have a read of Guns, Germs, and Steel, and see that being exposed to certain germs and building our immune system–especially when we are young–is very important to us living here on Earth.  We can try to change things to our liking, but we should realize things are pretty darn good here as it is.