Medical masks are a popular dust prevention item when going out, but how to wear them to help fight dust when air pollution is increasing like today, follow the answer of Dr. next post.
Air pollution is currently at an alarming level, especially in the city area. Ho Chi Minh and Hanoi are the two places with the highest pollution levels, located at dangerous levels. The sky for the past few days has always appeared milky white, densely covered with fog, making people afraid of air pollution.
According to the test information from the AirVisual site – Check the air pollution level indicated in Ho Chi Minh City and Hanoi are among the most polluted areas in the world Today.
In the face of increasingly serious air pollution, Dr. Tran Ngoc Dang, a professor of public health, a lecturer at the University of Medicine and Pharmacy in Ho Chi Minh City, said that PM 2.5 fine dust particles are extremely dangerous particles found in the air. , they have the ability to go deep into the body affecting the respiratory, cardiovascular and brain systems.
According to laboratory studies, to prevent this dust, it is necessary to wear an N95 or N99 mask, these are masks with extremely good dust resistance up to 99.59% but the price is high. Medical masks worn in the usual way can only resist 30-40%, Researchers from Thammasat University, Thailand experimented with using medical masks to filter dust and gave the following results:
Through the above results, using 1 mask and 1 paper towel gives dust resistance up to 98.05%.
firstWear 1 mask
When wearing a medical mask, it is necessary to point the direction of the metal wire upwards, Use your hand to squeeze this metal wire close to the nose for the mask to fit tightly to help better prevent dust.
Wear it this way Dustproof is about 66.37%.
2Wear 2 masks
Stack 2 masks against each other, then proceed to wear the same as wearing 1. This way helps to prevent dust about 89.75%.
3Combine 1 mask and 1 tissue
Line the inside of the mask with 1 sheet of tissue, then wear it as usual, the results show this way. help resist up to 98.05%.
According to Dr. Tran Ngoc Dang, if you do not have money to buy an N95 mask, the best way to prevent dust with a medical mask is to wear 2 at the same time or use 1 mask in combination with 1 tissue. Do not wear too many masks (more than 2) will be counterproductive aquí.