Medical masks include disposable medical masks, medical surgical masks and medical protective masks.The three medical masks all have the requirement of microorganism index, which includes two conditions: first, non-sterilizing masks (some enterprises label them as "non-sterile") should meet the microorganism control standard, that is, a certain amount of bacteria is allowed, but must be within the control range;Second, sterilization mask, do not allow the presence of bacteria.

Therefore, both non-sterilized medical masks and sterilized medical masks have protective functions, which can block droplets and prevent cross infection.

Both sterilized and non-sterilized disposable medical masks conform to the standard of YY/T 0969-2013 Disposable Medical Masks and are available for use.