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How well do face masks protect against COVID-19?

Respirators

Masks called respirators have to meet specific standards and are designed to block almost all virus particles in the air. These masks include N95, FFP2, KN95 and other types. Respirators approved in the U.S. are called N95s. European respirators are called FFP2s and respirators from China are called KN95s.

This type of mask may be available in a range of sizes and is meant to be adjusted to fit the face. These respirators have adjustable nosepieces and bands or ties. Many respirators can be used more than once. Replace the respirator if it gets wet or dirty or if it's damaged.