Just wanted to say, it's not really "all on hygiene." I know many, many people who are dilligent about cleaning with bleach, washing their hands, keeping sick people isolated in their house, etc., and still caught it. Your immune system plays a HUGE roll in it as well! I know people who take no precautions and don't catch it either. To say it's all on hygiene implies that those who do catch is are not clean, and that's wrong.