This standard can effectively block the common carrier of virus: droplet.Droplets are generally between 1 and 4 m in diameter. The filtering effect of KF94 mask maximizes the direct contact of droplets with human respiratory tract and prevents virus invasion. However, KF94 does not meet the medical standard, so there is no relevant standard of bacterial filtration rate in the production process.In addition, the external materials are the same as non-medical KN95 and N95 masks.Splash proof is not as good as medical.Once droplets are contaminated, there is still a risk if masks are not replaced for a long time.

Therefore, KF94 can play a role in personal protection when going out, but its effect is slightly lower than KN95 level protective mask.