Medical/Surgical Face Mask

With the complex evolution of epidemics as well as the increase of environmental pollution, wearing medical masks is extremely necessary. Nowadays, all kinds of face masks, medical masks, surgical masks are not too expensive and are diverse in types so people can buy for themselves and their families quality medical masks. However, you should also note that you should only buy medical masks at reputable addresses, absolutely avoid buying unknown masks, not quality assurance. So, are face masks, medical masks, surgical masks effective in preventing disease?