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While the coronavirus outbreak has rapidly increased its impact around the world, especially in our country, scientists who released a statement on the outbreak said the outbreak could be stopped if the rate of wearing masks in cities increases. to 70%. Experts insist that there is still luck.
The number of corona viruses captured in the world is approaching 69 million, the total number of patients in Turkey was 608 thousand. The number of deaths worldwide, while 1 million and 460 thousand, while the number of our citizens who lost their lives in Turkey was 13 thousand 558.
While many unknown details about the corona virus continue to remain in the middle, experts continue to investigate the outbreak to stop.
Health experts often recommend using a face mask to reduce the spread of COVID-19, according to Popular Science news. This has led to studies investigating the physics of using masks, as well as materials, designs, and other factors that influence how masks work.
In the study published in the journal Physics of Fluids, the researchers looked at the research on face masks and their use, and summarized what we have learned so far about the ways in which face masks filter or block the virus.
BELOW 5 MICRONS ARE MORE DANGEROUS
One of the important factors affecting the function of the face mask is the size of the droplets of liquid that the person exits from the nose and mouth while talking, singing, sneezing, coughing and even simply breathing. Large droplets of around 5-10 microns are the most common of these. But these droplets are still quite small. For comparison; a human hair has a diameter of about 70 microns.
In fact, smaller droplets below 5 microns are likely to be more dangerous. These become aerosols and remain suspended in the air for a long time. Of the many mask types used (fabric masks, surgical masks, and N95 masks), only N95s can filter aerosol-sized droplets.
The efficiency of face masks that are worn for hours while healthcare workers and other necessary workers wear determines the overall effectiveness of a mask. Thermal comfort is an important issue, especially in hot and humid environments.
A MORE PRECISE SHAPE MUST BE DETERMINED
Researchers found that face masks made from hybrid polymer materials filter out particles with high efficiency and cool the face at the same time. Since the fibers used in these special masks are transparent to infrared rays, they allow heat to escape from under the mask.
Lead author Heow Pueh Lee states:
“There may be a correlation between breathing resistance and the flow resistance of the mask. This connection needs to be examined in terms of usage time. Furthermore, in such studies, the environmental conditions of the area inside the face mask should be determined more accurately using miniature sensors and mannequins. “
The researchers also studied epidemiological studies aimed at determining whether face masks reduce the effective reproductive coefficient. If the reproduction coefficient falls below 1, the spread of the epidemic stops. One of the studies used COVID-19 data in the US state of New York.
Sanjay Kumar, the study’s author, said:
“The results show that continued use of effective face masks such as surgical masks can lead to the end of the epidemic; But if at least 70% of urban residents use such masks in the public, even the less efficient fabric masks can slow down the spread if worn continuously. “
Source: Popular Science
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