For goodness sake! Why in the world does everyone insist on "building up a resistance" by exposing my child to germs unnecessarily?
Because it's TRUE! This idea is actually backed by science.
There are many kinds of "germs" that serve different functions in our bodies. Believe it or not, there are actually many bacteria that help our bodies to digest food and perform other functions! And even those that don't actually perform a specific function but are generally benign help us by keeping the population of "nasty" bugs at a minimum!
What happens when we kill too many of the weaker, benign germs? We allow the stronger, nastier bugs to multiply (they do this because suddenly there are greater resources i.e. food available for them).
As our bodies are exposed to various kinds of germs (bacteria and viruses) they experience an immune response. This response leaves behind an "action plan" for when the body is exposed to this type of organism again in the future. It's called "immunity" - our body simply learns how to mount a good defence at the first sign of that now-familiar invader, which mans it gets killed pronto. Therefore, kids who are exposed to many different types of germs develop many different strategies for dealing with the next exposure, and over time they become very good at killing these things before they multiply enough to cause symptoms of illness.
Yes, they can get unlucky and get hit with a few unknown germs one after the other, which will weaken them for a while. Thus they may appear to go through quite a "sickly" phase. But they will get the long-term effects later on - and maybe when important exams and things like that come up later in their lives they will not be ill for them! When they are little and have no important sports events and exams is the time for them to get sick!
Obviously there are "nasty" bugs out there, which is why we practice good bathroom and eating hygiene, as this is where you find most "nasty" bugs. But you can't kill them all, and the strongest ones will often find a way to get through the "blitz" of cleaning chemicals anyway. The harsh cleaning chemicals kill the poor weaker germs (that don't cause serious illness, or any illness at all in many cases) and leave the strongest, most deadly ones. Also, the use of indiscriminate antibiotics over the years hasn't helped things - it has only facilitated the development of resistant strains of bacteria, which aren't going to be killed by your Purell or Lysol!
If a person is immune-deficient for some reason, then it's a whole other ballgame. But for most people, reasonable hygiene with soap and water is all that is required to stay healthy.
Thus ends my public service announcement for the day!
I hope I haven't offended anyone. I just wanted to be sure that the germaphobes realized that what they were doing may not be the best long-term strategy. If you still feel the need to disinfect everything then go for it .... but just know that, unless you have a child with immune deficiencies, you really don't need to!!