January 29th – Fauci and other U.S. public health experts advise people to wear two layers of masks to strengthen the prevention against the novel coronavirus and its variants.
“Wearing two layers of masks obviously adds protection, so you’ll see someone wearing two layers of masks and someone wearing N95 masks,” Fauci, director of the National Institute of Allergy and Infectious Diseases, told NBC this week.
The report said that, as Fauci explained, masks are physical coverings that prevent respiratory droplets from spreading to others and provide a degree of protection for the wearer.
In addition, in mid-December of last year (2020), Marl, professor of environmental engineering at Virginia Institute of Technology and State University and a leading expert on the spread of viral aerosols, and Gandhi, a professor of medicine at the University of California, San Francisco Medical Center, also co-authored for wearing two layers of masks.
Although the Centers for Disease Control has not yet recommended the use of double masks, the practice caused a sensation when Biden and others were seen wearing two masks at the presidential inauguration ceremony last Wednesday (20th).
Biden and Vice President Harris have been wearing two layers of masks for weeks, according to the report.
Biden was spotted before he took office, and there was also a medical mask under his signature black cloth mask.
In addition, viewers note that poet Gorman and Biden’s nominee for Secretary of Transportation Buttigieg, etc., both wore medical masks under cloth masks.
The researchers said that wearing a surgical mask under a cloth mask can provide maximum protection, because the surgical mask acts as a filter, and the cloth mask adds another layer of protection and helps to fit.
Two layers of masks provide additional protection in places where social distancing is difficult (such as on an airplane or in a store).
The next best option is a three-layer mask with an internal filter.
Research shows that single-layer masks are not very effective in blocking aerosols; handmade two-layer and three-layer cloth masks also have only 50%-60% protection; and medical masks have 50% effectiveness against other people’s spraying aerosols.
However, Allen, an associate professor at Harvard University School of Public Health, said that medical masks and cloth masks will improve their resistance to particles to more than 91%.
N95 masks are specially designed to be very close to the face, which can form a seal that can filter 95% of the particles in the air.
However, these masks are not recommended for the general public, because they should be left to medical staff and medical emergency personnel.
Biden had earlier signed an executive order requiring the American people to wear masks in planes, trains, buses, airports and federal industries.
A December 2020 survey conducted by the Kaiser Family Foundation found that more than 70% of Americans said they were wearing a face mask.