You are always getting sick, Sion.
I would like to posit that you don’t wash your hands enough.
If you decide to reply that I sound obsessive/compulsive, I doubt I would argue with you. ;-)
But, I hardly ever get sick. |-)
Most people get what’s going around because they shake hands with people who have what’s going around. If I don’t shake hands (I like hugs, actually) I don’t catch anything.
I mean, I have enough trouble as it is. You could always wear surgical gloves and when someone asks why, you could say you might be coming down with something and don’t want to pass it around.
Try it for a while and see what happens.