Hospital scrubs

I saw two adult men in hospital scrubs at the coffee shop this morning. They bumped elbows instead of shaking hands (the new flu greeting). Yesterday I saw a doctor in a white coat there--could read the embroidered name.

That's odd if you're concerned about germs--that you would wear your protective covering home and to the coffee shop. I asked the chemistry teacher in the next booth about it. She told me they probably change when they get to the hospital/clinic/office. Hmmm. So that means they brought yesterday's germs home to the family and neighbors?