Masks can prevent a person from contracting respiratory diseases and reduce the risk of novel coronavirus infection.

1. Basic principles of use

The National Health Commission (NHC) of China has released a public guide regarding the use of masks for prevention against novel coronavirus. Recommended masks vary for different groups of people.

2. When to wear what?

Masks, including disposable surgical masks, medical surgical masks, particulate respirators and medical protective masks, are recommended by the NHC for different scenarios.

3. After use

Masks used by healthy people have no risk of viral transmission. But the ones used by suspected and confirmed patients are classified as medical waste and should be disposed of strictly in line with medical waste treatment requirements.