Whether you choose N95 masks or ordinary medical masks, since the droplet diameter of pathogenic microorganisms is greater than 5 microns, it can achieve the protection function. As long as the mask is certified by the country, the quality is good, and the mask is used correctly, it can play a protective role.
Ordinary medical masks and medical surgical masks have low breathing resistance, which can meet the needs of most people in public places. If you choose protective masks, you need to pay attention to kN95 masks and N95 masks, both of which are breathing valves and non-breathing valves. The protective mask with one-way breathing valve has low breathing resistance, can quickly exhaust the moisture and heat in the mask, and has good comfort. But for those who have been infected, the pathogenic microorganisms will still be exhaled, posing a threat to the body. People with symptoms of respiratory infections, such as sore throat, runny nose, cough or fever, should not wear this mask.