Marketplace tested over 20 different masks. Here's what will best protect you and others during the pandemic

Marketplace tested over 20 different masks. Here's what will best protect you and others during the pandemic

Public health officials have said masks are critical to reducing the spread of COVID-19, but rigorous tests conducted on behalf of CBC's Marketplace found that while some work very well, others offer little protection from particles that transmit the novel coronavirus. And one type of mask can even spread the particles to others.

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