At present, wearing medical masks is considered to be one of the effective means to prevent the spread of COVID-19. However, there are many types of masks.
A variety of masks can prevent the COVID-19 effectively such as KN95. If the medical worker and a person who often enters a high-risk area, They must wear a medical mask.
“N” stands for non-oily particulate matter. ”95″ stands for the minimum protection level of 95%. KN95 can provide better protection in daily life.
Respirators without breathing valves can be protected in both directions. Both inhalation and expiration must be filtered through the mask.
There is a one-way breathing valve mask. The users can only protect themselves.It is unable to protect people around.
So,it is recommended that people wear masks without breathing valves. In crowded areas, masks above KN95 level can be used for a day, and disposable N95 masks cannot be reused after being removed. The maximum use time of disposable surgical masks is 4 hours, and they should be replaced immediately after getting wet.
Post time: Jun-23-2020