Do masks reduce your oxygen levels? Your COVID-19 questions answered

We're answering your questions about the pandemic. Send yours to [email protected] and we’ll answer as many as we can. We’ll publish a selection of answers every weekday online, and also put some questions to the experts during The National and on CBC News Network. https://www.cbc.ca/news/health/masks-oxygen-covid-questions-answered-1.5653404?cmp=rss #news/health