What do masks do?

With some countries already emerging from lockdown, can wearing face mask in public places help to keep coronavirus infection rates from rising again?

Background: Observational epidemiologic data advise that transmission of viral respiratory infection was significantly reduced through the SARS epidemic by using markers as well as other infection control measures. However, there isn’t any prospective randomised control trials on goggles in prevention of viral respiratory infections Aims: To determine the efficacy of surgical masks and P2 masks in households about the interruption of transmission of respiratory viruses.

Medical masks: These are also scarce and may supply only by medical workers. Sometimes called surgical masks or procedure masks, these masks are the types of rectangular shaped coverings (often pleated) that come with elastic ear loops. Medical masks are made from a paper-like nonwoven material, and so are often presented to a coughing patient waiting to view a health care provider. Compared to the N95 mask, a medical mask filters about 60 to 80 percent of particles and, in accordance with the Food and Drug Administration, mostly blocks “large-particle droplets, splashes, sprays or splatter that could contain germs.”

Surgical masks are the next step down, offering protection against large droplets. This is the type of mask CDC currently recommends for some medical workers, caregivers, and people who are sick. In recent weeks, a wave of hospitals in Boston, San Francisco, and Providence, and also other US cities, have started requiring all their health care workers wear these masks, six doctors and nurses told BuzzFeed News.

Other workarounds target 3-D printing, which may produce hard, clear face shields that protect healthcare workers’ eyes and possibly extend the life span of markers. That’s what are the Qualcomm Institute on the University of California, San Diego is attempting to do. “Improvised visors by incorporating 3D-printed parts seem essentially the most feasible,” say engineer Ramesh Rao, the institute’s director.


The widespread using face masks by the public could put NHS supplies vulnerable, says Chris Hopson, leader of NHS Providers. WHO officials usually do not recommend mask wearing for healthy members of the typical population.

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