I was on the train earlier and this older man flipped out at an asian kid with a cold to "stop coughing".
I pointed out he could politely ask someone to cover their mouth, rather than blowing a fuse. It's not like you can stop a cough. His response? "Not during a public health crisis."
These people's reactions are not proportional to the threat: it's hysteria.
Fear is not an excuse to be rude to others.