ECRI quality assurance researchers tested nearly 200 N95-style masks, reflecting 15 different manufacturer models purchased by some of the largest health systems in the United States.
from WebMD Health https://ift.tt/3j1VhLt
ECRI quality assurance researchers tested nearly 200 N95-style masks, reflecting 15 different manufacturer models purchased by some of the largest health systems in the United States.
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