Demonstration of Antiviral Activity of far-UVC Microplasma Lamp Irradiation Against SARS-CoV-2.

BACKGROUND: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for the coronavirus disease 2019 pandemic. METHODS: In this study, the antiviral activity of a far-UVC (222 nm) microplasma flat lamp against SARS-CoV-2 was evaluated. RESULTS AND CONCLUSIONS: Immediate inactivation of up to 99.99% of the coronavirus was achieved with a dose of less than 8 mJ/cm2 and complete inactivation was observed by real-time RT-PCR; therefore, far-UVC (222 nm) is a promising candidate for the effective inactivation of SARS-CoV-2.