Share this postCanadian Public Health Recommended Polypropylene Masksmathewaldred.substack.comCopy linkFacebookEmailNoteOtherCanadian Public Health Recommended Polypropylene MasksIn November 2020, Canada's Chief Public Health Officer, Dr. Theresa Tam, Recommended Polypropylene MasksMathew AldredApr 07, 2022∙ Paid7Share this postCanadian Public Health Recommended Polypropylene Masksmathewaldred.substack.comCopy linkFacebookEmailNoteOtherShareThis post is for paid subscribersAlready a paid subscriber? Sign in