Feb 2020 BBC World

“How effective are face #masks in preventing the spread of airborne diseases? #coronavirus”

Policymakers know surgical masks are inadequate, yet refuse fitted respirators

#SamaraSARS

https://x.com/bbcworldservice/status/1224293997964931072?s=46&t=YtH0FORQ1B8qPptHQvMSVw https://nostrcheck.me/media/2129981bda0476c452d495faa07f6e039233715eee92cd436db6cdb62d606828/0e735386b6c3eafecd65f453797a1133b5026e38a3cd199b7a798f0ecf2590d5.webp