Even in "normal" conditions, defined as pre Wuhan virus times, workers at Fairwood, CafeDeCoral etc. wear where a shied across their mouth. There is a hygenic and public health reason for wearing maskes. The risk of getting sick goes up by many multiples (catching someone's cold or flu to Wuhan virus infection) its most prudent to take the path of least regret and simply wear a mask. If you dont have an N95, wear a surgical mask. The curves of Taiwan, HK and Singapore versus those in Western countries show that wearing a mask does contribute to fewer infections. The only reason people are discouraged from wearing mask is resource allocation. Best practices are following in a heath care setting. Why would you not follow best practice with your own health?