Daily protective masks cannot protect against coronaviruses and it is recommended to wear disposable medical-surgical and higher grade masks. Daily protective masks cannot protect against the new coronavirus because the thickness of such masks is not up to the required level, especially in areas where the epidemic is relatively serious and where the thickness is insufficient to lose the protective effect. It is usually required to wear disposable medical surgical and above level masks, especially those produced by regular manufacturers, whose thickness and protection have been certified to provide safer protection to the wearer. If the medical staff and other high-risk industries, you also need to wear N95 masks and other higher levels of protection masks.