I wash my hands more than any other person I know. I think there must be so many variables when it comes to catching a sv* that its no guarantee though. Yes obviously I get the importance of hand washing but surely the vast majority of people know about basic hygiene. Using my co-workers example of a sv* its just so random - firstly her 30 year daughter had it, followed 4 days later by my co-worker. As far as Im aware her 2 grandchildren, her hubby & her daughters partner didnt get it, and her hubby has a very compromised immune system due to the meds he has to take.