My undergraduate work was in microbiology. While I'm now a programmer, I've always been in awe of the microbial world and how it interfaces with humans.

I've developed a theory over the years that many (if not all) misunderstood disorders could be caused by yet discovered virus and or bacteria.

So many people develop bazaar conditions seemingly out of nowhere, that science simply doesn't have an answer for yet. For example - polymyositis/dermatomyositis. Theories abound, but so far none of them point concretely toward infection. I believe (but can't prove) that diseases like this could be caused by infections.

It's a scary proposition that a random bug bite might be enough to alter the course of your life. But I would rather we start discussing this as a very real possibility and not a hypochondriac's way of thinking.