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Because the diameter of the pneumonia (atypical pneumonia) virus is about 0.1 to 0.12 microns, wearing N95 or KN95 masks are both feasible prevention methods.

In addition, medical surgical masks can also be used to protect against infectious diseases. Medical surgical masks can block 70% of bacteria, while N95 masks can block 95% of bacteria. The latter has a stronger blocking effect.

Paper masks, activated carbon masks, cotton masks, and sponge masks are not compact enough to prevent infection.

For the purpose of self-protection and reducing the risk of respiratory tract infection, you can wear the following two kinds of masks (medical surgical masks, N95 masks).

If you go to a general open public place and do not he close contact with respiratory patients, it is sufficient to wear a medical surgical mask without excessive protection. However, if you will come into contact with patients with suspected respiratory tract infections, you need to wear bio-resistant N95 masks for effective protection.

But everyone soon discovered that these masks are basically in the stage of being out of stock and replenishment, leing everyone at a loss for a while. Interested netizens he discovered a mask from South Korea, the standard is KF94, let's see if this KF94 can meet your needs.

New forite online, KF94 mask

Everyone knows that KN95 is our country's standard for protective masks, which means that non-oily particles with a diameter of 0.3μm filter more than 95%. The KF94 mask is a standard developed by South Korea. According to the data on the official website of the Korean Food and Drug Administration (MFDS), the mask under this standard has a filtration rate of more than 94% for particles with a diameter of 0.4μm. In other words, KF94 standard masks can filter out at least 94% of particles with a diameter equal to 0.4μm. Therefore, KF94 is similar to KN95 and N95. They are all masks under the same protection level, but the protection ability is different.

Can KF94 masks prevent viruses?

Although this data is not very effective for directly filtering viruses, after all, the diameter of the disease is only about 0.1μm, but it can effectively block the common virus carrier: droplets. The diameter of the droplets is generally between 1 and 4μm. The filtering effect of the KF94 mask can prevent the droplets from directly contacting the human respiratory tract and prevent virus invasion.