— Number of safe reuses varies by decontamination method, study states
N95 respirators can be safely decontaminated without undermining functional integrity only two or three times, a government study showed.
Both ultraviolet light and vaporized hydrogen peroxide met the bar for killing off SARS-CoV-2 virus that causes COVID-19 without impacting fit testing for two rounds of wear and decontamination compared with control respirators. Filtration remained "acceptable" after a third round for those two methods as well.
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