One model of mask distributed to Quebec schools and daycares may be dangerous for the lungs as they could contain a potentially toxic material, according to a directive sent out by the provincial government on Friday. Radio-Canada has obtained documents showing Health Canada warned of the potential for "early pulmonary toxicity" from the SNN200642 masks made by Métallifer, a Quebec-based manufacturer. Health Canada conducted a preliminary risk assessment which revealed a potential for early lung damage associated with inhalation of microscopic graphene particles. Radio-Canada has learned these masks were also distributed to Revenu Québec in recent months. This is not the first time masks distributed to daycares have been recalled.

Source: CBC News March 26, 2021 23:03 UTC