June 10, 2020
“Face mask use needed to ‘prevent Covid-19 second wave’”
https://www.sciencefocus.com/news/face-mask-use-needed-to-prevent-covid-19-second-wave/
- According to a study from the universities of Cambridge & Greenwich, the widespread use of face masks keeps the Coronavirus ‘R’ number below 1.0 & prevents further waves.
