Not all masks are created equal. Researchers at Duke University have tested 14 types of mask and other facial coverings and found that some are wanting when it comes to coronavirus protection, while others are quite good.
New York Daily News
Not all masks are created equal. Researchers at Duke University have tested 14 types of mask and other facial coverings and found that some are wanting when it comes to coronavirus protection, while others are quite good.
New York Daily News