Montreal transit workers the latest to learn they've been wearing potentially toxic masks

https://montreal.ctvnews.ca/montreal-transit-workers-the-latest-to-learn-they-ve-been-wearing-

 https://healthycanadians.gc.ca/recall-alert-rappel-avis/hc-sc/2021/75309a-eng.php

Related 

 https://medium.com/edge-of-innovation/how-safe-are-graphene-based-face-masks-b88740547e8c

 https://shore-215.blogspot.com/2021/04/i-just-now-feel-bit-betrayed-quebec.html

 https://shore-215.blogspot.com/2021/04/toxic-nanoparticle-masks-sent-to-quebec.html