People checking in on the screen without using the hand gel, coughing everywhere, blowing noses into tissues then holding the tissue and touching chairs, door handles etc. I've seen the same at work. I've been ill since before Christmas because people behave like this.
People are grim. The receptionist at our GP refused to check me in the other as you have to use the touch screen, but I refused to touch it as a guy had just sneezed all over it and wiped it with his sleeve
Thankfully the practice manager was there and told her to just do it and went off to find someone to clean the screen. It's around the corner from them so they can't see it so I bet that happens more often than they realise