I fear that all the x-tra hand washing and sanitizing may be making our immune systems weak or lazy and more susceptible to the regular germs and bacteria that we were once able to fight off because we were exposed to them on a day to day basis.
I remember a few years ago I was going on winter vacation to a sunny tropical place and I wanted to make sure I didn't catch a cold or the flu before we left and ruin the vacation. A few weeks before we left I was super diligent about washing my hands and using hand sanitizers and not touching my face. I even went so far as to wipe down the armrests and tray table on the plane with a antibacterial wipe.
Two days after we arrived, I got some sort of flu and it just about knocked me out. I have never been so sick before or since. My wife, who is in the medical field, says it was because I had weakened my immune system by killing every germ and bacteria instead of having built up a resistance to them.
Who knows ?