https://www.nytimes.com/2020/03/31/health/cdc-masks-coronavirus.htmlC.D.C. Weighs Advising Everyone to Wear a Mask
...Guidance on mask wearing is “being critically re-reviewed,” said Robert Redfield, director of the C.D.C.
...Dr. Robert Redfield, the director of the C.D.C., confirmed in an interview with WABE in Atlanta, a National Public Radio member station, on Monday that the agency was reviewing its guidelines on who should wear masks. Citing new data that shows high rates of transmission from people who are infected but show no symptoms, he said the guidance on mask wearing was “being critically re-reviewed, to see if there’s potential additional value for individuals that are infected or individuals that may be asymptomatically infected.”
The coronavirus is probably three times as infectious as the flu, Dr. Redfield said. Some people are infected and transmitting the virus probably as long as two days before showing any symptoms, he said. “This helps explain how rapidly this virus continues to spread across the country, because we have asymptomatic transmitters and we have individuals who are transmitting 48 hours before they become symptomatic,” Dr. Redfield said in the interview.
“That’s important, because now you have individuals that may not have any symptoms that can contribute to transmission, and we have learned that in fact they do contribute to transmission,” Dr. Redfield said.
...studies involving the flu suggested that you could reduce your ability to spread the flu by about 50 percent if you wore a mask.
https://khn.org/morning-breakout/cd...ng-a-run-on-n95s-that-protect-health-workers/