Since the reopening of U.S. states, the spread of the new coronavirus has increased,media reported, because not enough people are following simple recommendations that reduce the risk of transmission. Frequent hand washing, social izing and wearing a mask do not completely eliminate the risk of contracting the virus, but it can significantly reduce the risk.
It is understood that masks can prevent the spread of saliva particles carrying the virus in the air and infect others. This protection is two-way, because the same particles can also be prevented from entering the wearer’s mouth and nose. New data suggest that masks can reduce the wearer’s risk of viral infection by 65%, a figure that can be said to be quite significant.
Dean Blumberg, director of pediatric infections at UC Davis Children’s Hospital, told the media: “We’ve learned more from research and more scientific evidence, and we now know that masks not only prevent (the virus) from spreading but also protect people who wear masks.” So even a standard rectangular surgical mask reduces the risk of infection to 65%. “
The doctor noted that the N95 masks worn by medical professionals provide more protection and further reduce the risk of transmission. However, these masks are not in sufficient supply and are necessary for medical professionals.
“Everyone should wear a mask,” Blumberg said at a school event. Those who say ‘I don’t believe masks are useful’ are ignoring scientific evidence. This is not a belief system. It’s like saying, ‘I don’t believe in gravity. ‘”
“We don’t know who will spread it,” Blumberg said. “
It is understood that droplets are visible particles to the naked eye, only 1/3 of the size of human hair. In response, scientists say masks are effective in blocking them. However, these aerosol particles are much smaller, only one percent the size of human hair, and they stay in the air longer. These particles can be used in a variety of materials used to make masks, especially homemade masks. Social distance and proper ventilation facilitate the flow of air and aerosols.
William Ristenpart, a professor of chemical engineering who worked with Blumberg, said: “Laboratory studies have shown that viruses live as aerosols with a half-life of several hours. It will always be in the air. That’s why, if possible, you want to choose to be outdoors in any social situation… If you are indoors, consider opening the window. You need as much fresh air as possible. He added that bars and other indoor venues are dangerous to people: “The louder you speak, the more aerosols you spit out.” “