“Coronavirus – ‘Deadly masks’ claims debunked” Face masks definitely do not cause harmful CO2 exposure or shortage of oxygen. https:

“Coronavirus – What kind of face mask gives the best protection against Covid-19?” https://www.theguardian.com/world/2020/jun/21/coronavirus-wha

“Face masks critical in preventing spread of Covid-19” https://www.sciencedaily.com/releases/2020/06/200612172200.htm A study has found that wearing a

“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/ Accor

“Coronavirus – Can face coverings really protect you?” https://news.sky.com/story/coronavirus-can-face-masks-really-protect-you-11931121 A repor

“What Is the Best Type of Face Mask for You?” https://www.healthline.com/health/best-face-mask-2 We learn here that health agencies including CDC now