I don't think you're too worried about it - I was the same way. As my date approached, I was ultra aware of anyone who was near me who might be sick. I avoided them like the plague. My wife and son caught colds in the days leading up to my surgery. I even spent a few nights sleeping on my own when my wife's cold peaked ...couldn't even kiss her goodbye when I went in for surgery. At that stage, avoiding a cold was pretty much paramount to me. And I did avoid it. Lots of hand washing, changing bed sheets when they were both sick, keeping the windows in the house cracked open to let in fresh air, a weekly house cleaner, etc. Maybe I was paranoid, but I didn't want to have my surgery delayed, or to get sick right after I had it. Just take whatever precautions you think you need and make sure you get plenty of rest...