if confronted with the choice of wearing a mask or not, better to wear it.
Some articles explain best is to wash your hands with hydroalcoolic fluid or soap...
Mask may be good for any similar disease, like flu, to protect others.... it seems socially promoted and accepted in Asia... not in France...
Flu is dangerous, and as asthmatic, my doctor explained me, that it may not kill me normally, unless it does kill me... 17 dead in France already. Thousands every year.