Well, it has an effect on all types of chronic conditions, so I wouldn't go so far as to say that it has an effect on the critters that we have - although until research is done on this, we really don't know.
My doc operates on the theory that the full moon has the same affect on all body fluids - even inflammation - as it does on the tides of the ocean. I don't know that she's right, but it's one theory. And at least she understands!!!