Can that medical protective mask protect COVID-19?

Wear an ordinary mouth? Cover can also protect COVID-19, but let? Is there protection? Higher performance port? Can the lampblack be compared? It works. Me? Buy your own mouth? Cover also tends to choose? Choice? More protective? Mouth? Cover, currently using Na? Tons? NTHN？ 95E medical protection? Mouth? The cover, it? what's up Starting from our country? Major R&D design? Is that Long Lindun medical insurance? Mouth? Cover? Evolved? Coming? High performance medical protection? Mouth? Cover, protect? Ability? Better, right? , although? Our place? Edge? what's up Heavy? Disaster? District? , but? We should also take preventive measures. Your adoption is my motivation.