Disposable Surgical Maskis relatively large, including medical surgical masks, as well as ordinary medical masks and medical protective masks. Medical protective masks are commonly referred to as American standard N95 masks and my country's standard KN95 masks and medical surgical masks, which can block particles larger than 5μm in the air. The general droplet diameter is above 0.5μm, so for the general population, if the new coronavirus and common bacteria are blocked, it is sufficient to wear a general medical surgical mask.
For medical protective masks, it can block particles larger than 3μm in the air, which means it can prevent aerosols. The diameter of aerosol is generally less than 5μm, which is suitable for medical personnel to wear. Medical personnel must be able to prevent aerosol masks because of contact with patients, that is, medical protective masks. For ordinary medical masks, the protection effect is the lowest. For particles and bacteria in the air, the filtering effect cannot reach KN90. Therefore, it does not have a protective effect, but is only suitable for nursing, cleaning and wearing, also known as disposable nursing masks.
Medical surgical masks have better protective effects than disposable masks, and can block 75% of bacteria, viruses or fungi. Whether it is using surgical masks or disposable masks, it is not recommended to use them repeatedly, and it is required to replace them every 4 hours. If you are a medical worker, medical surgical masks are the first choice. If ordinary people go to dense places, including taking a bus or going to a shopping mall, they can wear disposable masks. However, for medical workers working in hospitals or other people working in hospitals, it is recommended to wear medical surgical masks. After all, the protective effect of surgical masks is stronger than that of disposable masks.