The pneumonia epidemic caused by the new coronavirus has always affected the hearts of the public.
Among the many preventive measures, one particularly important is "wearing a mask."
Can wearing a mask prevent infection?
Common masks are as follows: disposable masks, N95 masks.
1. Disposable masks (medical surgical masks)
It can prevent respiratory infections to a certain extent, but cannot prevent haze.
Medical surgical masks have three layers, from the outside to the inside are the waterproof layer, the filter layer, and the comfort layer. The comfort layer is a layer of non-woven fabric. When wearing, the white non-woven fabric is facing inward, the blue waterproof layer is facing outwards, and the side with the metal sheet is facing upwards. Fit the nose and smooth the cheeks so that there is no gap between the mask and the face.
Pay attention when buying, you should choose a mask with the words "Medical Surgical Mask" clearly marked on the outer packaging.
It can effectively prevent respiratory infections and prevent haze.
The N95 mask is one of the nine anti-particulate masks certified by NIOSH (National Institute of Occupational Safety and Health). "N" means not suitable for oily particles (the fume produced by cooking is oily particles, while the droplets produced by people talking or coughing are not oily); "95" means that under the testing conditions specified by the NIOSH standard, filter The efficiency reaches 95%.
N95 is not a specific product name. Products that meet the N95 standard and pass the NIOSH review can be called "N95 masks."
The biggest feature of the N95 mask is that it can prevent droplet infection caused by the patient's body fluids or blood splashes. The size of the droplets is 1 to 5 microns in diameter. The U.S. Occupational Safety and Health Administration (OSHA) stipulates that medical personnel exposed to tuberculosis bacteria must wear masks above the N95 standard for medical institutions.
Compared with medical surgical masks, N95 masks are more airtight. When choosing N95 masks, try to choose N95 masks without a breathing valve.
N95 is not a brand, but a mask model. N95 is based on the American standard, which divides professional protective masks into three categories and nine models.
For more product information, click here: disposable protective mask.