a photograph shows one petri dish that was coughed on by a person not wearing a mask and another petri dish coughed on by the same person wearing a mask
a photograph shows one petri dish that was coughed on by a person not wearing a mask and another petri dish coughed on by the same person wearing a mask
the best reason for wearing a mask is not medical. the best reason is to be considerate of those who are frightened by this outbreak and are made uncomfortable around people not wearing one. so mask up not to be safe, but to be nice.