Call me anal but I had my wife open doors for me so I wouldn't have to touch the handles. I wore driving gloves a lot, especially when grocery shopping. Just think about all of the potential disease vectors - gas pump handles, ATM pushbuttons, grocery carts, handshaking greeters at your church - the list is endless - any things commonly touched by people at large or in public places. I still carry waterless hand disinfectant in my car. We very very diligent about disinfecting the kitchen and bathroom as well. I avoided colds and flu very successfully in the first 2 years - which could have easily caused pneumonia in a compromised immune system.
Kids aren't very discriminant about who or what they touch - that's why colds and flu are so prevalent in schools. Make sure that they wash their hands frequently, especially before seeing grandma.

Think about it, back in the old days, people having this type of treatment would probably be placed in an isolation ward.