COVID-19 mask use: Types of masks and respirators

Face masks - COVID-19

COVID-19: How to Select and Wear a Mask

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Face Masks: Types & When to Use

Face masks 101: Infection control

Scientists tested 14 types of masks: Here's what worked and what didn't - ABC News

A Mask Q&A: Addressing common questions about the KN95, N95 masks and more, School of Public Health

When and how to use masks

COVID-19 Q&A: Masks are an important tool to protect against disease