But wearing a mask and frequent hand washing must be done at the same time, both are indispensable.

The difference between ordinary medical masks and surgical masks is mainly from material and protection.

Face masks have a certain filtering effect on the air entering the lungs.

Wearing a mask is also very important. Do you know the correct way to wear a mask? Let me tell you. The following are the steps for wearing a mask...

N95 Respirator is one of the 9 kinds of particulate protection masks certified by NIOSH. "N" means not resistant to oil. "95" means that when exposed to a specified number of special test particles（China N95 respirator)

The N95 respirator has a filtration efficiency of more than 95% for particles with an aerodynamic diameter of 0.075µm ± 0.02µm. The aerodynamic diameter of airborne bacteria and fungal spores mainly varies between 0.7-10µm, which is also within the protection range of N95 respirator.(China N95 respi......