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The Purpose of a Mask Is to Filter Droplets Containing

Question 1

Multiple Choice

The purpose of a mask is to filter droplets containing microorganisms expelled from the mouth.What is another purpose for the mask?


A) It's a good idea to wear two masks for better protection.
B) Many masks filter about 99% of particulate matter larger than 5 mm.
C) Masks are still effective if they become moist.
D) Reusable cotton masks are still appropriate.

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