The Food and Drug Administration (FDA) is warning health care workers and other medical first responders about defective KN95 respirators imported from China for failing to meet a minimum particulate filtration efficiency of 95 percent in National Institute for Occupational Safety and Health (NIOSH) testing. This move is a part of the broader effort by the FDA to combat the sale of fraudulent COVID-19 products. The FDA first allowed the import of Chinese-made KN95 respirators on April 3, 2020, by issuing an emergency use …
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