I asked if she was from here, to which she replied "No". I then told her that we don't worry about that stuff here. She looked at me rather confused and said, "well, what about everyone else who isn't from here, what about our health?" I replied, "if you're so concerned with everyone's health, then why are you traveling during a pandemic? You could be a vector for the virus and not even know it. There's no virus here unless you brought it with you." Now, I know you want me to tell you a story of how angry she got, but that simply didn't happen. She just cocked her head to the side, nodded and walked off. Good talk.