There are lots of viruses that spread about in the winter, and kill. Years ago food shops had staff behind the counter to serve customers so they where the only ones to handle the food before you received it, now most of us go to the supermarket for our food, in turn picked up and put down by many hands ( the public) Would you be offended if supermarkets installed sanitising gel at the entrance to their store, or would you use it without question. With the present virus looming this could be put in place very quickly.