M. Biasin et al. , «UV‑C irradiation is highly effective in inactivating SARS‑CoV‑2 replication», Scientific Reports, 11: 6260, Mar. 2021, doi: 0.1038/s41598-021-85425-w.

Abstract

The potential virucidal effects of UV-C irradiation on SARS-CoV-2 were experimentally evaluated for different illumination doses and virus concentrations (1000, 5, 0.05 MOI). At a virus density comparable to that observed in SARS-CoV-2 infection, an UV-C dose of just 3.7 mJ/cm2 was sufficient to achieve a more than 3-log inactivation without any sign of viral replication. Moreover, a complete inactivation at all viral concentrations was observed with 16.9 mJ/cm2. These results could explain the epidemiological trends of COVID-19 and are important for the development of novel sterilizing methods to contain SARS-CoV-2 infection.

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https://www.nature.com/articles/s41598-021-85425-w