I'm more cautious when visiting my GP for repeat scrips. That waiting room is a regular petri dish of bugs. Snotty nosed children, coughing and sneezing all over the place...adults licking their fingers then turning the pages of magazines....(shiver...). I wear pants with pockets when in shopping centres, (and the aforementioned waiting room), and keep both hands in them so I don't touch germ infested surfaces. I use my elbows on the rail of the travellators and to push lift buttons. As Zoffiel says, any human is a potential for infection, regardless of where they've come from in the world. Take reasonable precautions at all times when out and about, as well as at home.