Currently, Covid-19 has been causing a dangerous epidemic of acute pneumonia. Many people have chosen to protect themselves by wearing a medical mask. However, which face mask is right to wear for the mask to maximize its effect.
- The structure of a medical face mask
Non-woven medical masks usually have 3 layers with 3 different uses. The outer layer has waterproof properties, effectively prevents droplets from splashing out when the patient sneezes, coughs, breathes hard … This outer surface is usually light blue in color to make it easy to distinguish. or a color (other than white) for identification.
The inner layer is always white, very distinctive from the outer layer. This inward-facing fabric face is close to the face skin, so it must be pure and smooth, without ruffled fibers, not to cause discomfort. In addition, the innermost layer needs to be water permeable to absorb sweat, creating comfort for the user.
The middle layer works to prevent droplets from splattering and filter dust, bacteria. It can be said that this is the class that determines the quality of the 3-layer medical mask. The “correct” filter layer must allow air to easily pass through, creating ventilation for the user but must be compact enough to filter out tiny particles or bacteria.
Structure of medical mask
Coronavirus has the size of about 150-200 nm (nanometer) and Influenza A virus has size of 80-120 nm, these viruses mainly reside in large saliva drops. According to a 2013 study: large droplets of saliva are usually between 75-360 micrometres (1 micrometer = 1000 nanometers), so this saliva can be easily captured by a medical face mask. usually with the ability to efficiently filter particles larger than 5 micrometres.
2. Which face to put on medical mask?
Instructions for wearing a medical mask: when wearing the mask, the green face must be left out (or the side is darker) because the blue side is water-resistant, large droplets of saliva will not be absorbed inside, could be dropped. The white, hygroscopic side must be directed inward to let the breath escape into the mask.
- When wearing a mask, cover your nose and mouth.
- Do not use your hands to touch your eyes, nose, or mouth when wearing a mask. This action will inadvertently infect your hands with corona virus and other pathogens to transmit to yourself and those around you.
- One-time medical masks should not be reused. After use, they should be thrown in the garbage with a lid.
- When removing the mask, do not hold it, but hold the strap over the ear to remove it.
- Wash hands with soap and clean water for about 20 seconds after discarding the mask.
Wear medical masks properly
3. Is it good to wear a black face mask?
Wearing a medical mask is essential to prevent Covid-19. We can wear black, blue, pink medical masks … are exempt from that masks are quality, have a clear origin and need to understand which mask to wear. correct for it to be effective in preventing viruses. Similar to the common blue medical mask. As for the black mask, we still have the white side facing inward, the black side facing out.
Wear a black mask Medical masks can protect you from the risk of transmitting the covid-19 virus if you use a qualified and correct mask.
