What are the applicable scenarios for masks?

Disposable medical masks: worn in ordinary medical environments to block the exhalation or exhalation of pollutants from the mouth or nose.

     Medical surgical masks: worn by clinical operators during invasive operations and other processes.

     Medical protective mask: It is a medical protective mask with a higher level of protection. In the medical working environment, it filters particulate matter in the air and blocks droplets, blood, body fluids, secretions, etc. It is worn by medical staff in special areas of isolation wards, isolation intensive care, and fever clinics.