Article from UCSF about the science behind wearing masks to slow COVID-19 spread.
We talked to UCSF epidemiologist George Rutherford, MD, and infectious disease specialist Peter Chin-Hong, MD, about the CDC’s reversal on mask-wearing, the current science on how masks work, and what to consider when choosing a mask.
www.ucsf.edu
What I found very significant was this passage:
”Two compelling case reports also suggest that masks can prevent transmission in high-risk scenarios, said Chin-Hong and Rutherford. In one case,
a man flew from China to Toronto and subsequently tested positive for COVID-19. He had a dry cough and wore a mask on the flight, and all 25 people closest to him on the flight tested negative for COVID-19. In another case, in late May,
two hair stylists in Missouri had close contact with 140 clients while sick with COVID-19. Everyone wore a mask and none of the clients tested positive.”
We may disagree on the mortality rate but the evidence is pretty clear that this virus is very contagious. To read that a man who tested positive for COVID-19 was on a flight from China to Toronto yet didn’t infect anyone sitting next to him is pretty strong evidence that masks provide protection.