PHILADELPHIA — Up to 70% of KN95 masks do not meet the U.S. standards for effectiveness, according to a new study by ECRI, a Pennsylvania-based patient safety organization. The findings suggest an increased risk of contracting COVID-19 for health…
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PHILADELPHIA — Up to 70% of KN95 masks do not meet the U.S. standards for effectiveness, according to a new study by ECRI, a Pennsylvania-based patient safety organization. The findings suggest an increased risk of contracting COVID-19 for health…
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