‘It’s likely that face masks, by blocking even some of the virus-carrying droplets you inhale, can reduce your risk of falling seriously ill from COVID-19, according to Monica Gandhi, MD, an infectious disease specialist at UC San Francisco.
‘These epidemiological observations are among the evidence that Gandhi and colleagues cite in a paper in the Journal of General Internal Medicine, in which they propose that masks can lead to milder or asymptomatic infections by cutting down on the dose of virus people take in...
‘To Gandhi, these case studies [comparing situations at cruise ships, seafood processing centres, etc] suggest that if more people wore masks, we could see less serious illness from COVID-19 and a higher proportion of asymptomatic cases, currently estimated to be around 40 percent of cases by the Centers for Disease Control and Prevention. Milder infections would ease the burden on the health care system, save lives, and even nudge us closer to herd immunity before a vaccine becomes available, said Gandhi.’
Read here (The University of California, San Francisco, July 31, 2020)