We had at least one such situation here: https://www.cbc.ca/news/canada/montreal/masks-early-pulmonary-toxicity-quebec-schools-daycares-1.5966387 https://www.c

We had at least one such situation here: https://www.cbc.ca/news/canada/montreal/masks-early-pulmonary-toxicity-quebec-schools-daycares-1.5966387 https://www.cbc.ca/news/canada/montreal/masks-early-pulmonar... https://montreal.ctvnews.ca/recalled-masks-were-worn-by-thousands-of-quebec-kids-feds-say-import-rule-wasn-t-followed-1.5388068 https://montreal.ctvnews.ca/recalled-masks-were-worn-by-thou... "coated in a substance called graphene oxide that’s linked to lung disease and is now banned in Canada, at least temporarily."