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  • Reduction of severe acute r...
    Murata, Takayuki; Komoto, Satoshi; Iwahori, Satoko; Sasaki, Jun; Nishitsuji, Hironori; Hasebe, Terumitsu; Hoshinaga, Kiyotaka; Yuzawa, Yukio

    Microbiology and immunology, January 2021, Volume: 65, Issue: 1
    Journal Article

    Severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) is causing the global coronavirus disease 2019 (COVID‐19) pandemic. Because complete elimination of SARS‐CoV‐2 appears difficult, decreasing the risk of transmission is important. Treatment with 0.1 and 0.05 ppm ozone gas for 10 and 20 hr, respectively, decreased SARS‐CoV‐2 infectivity by about 95%. The magnitude of the effect was dependent on humidity. Treatment with 1 and 2 mg/L ozone water for 10 s reduced SARS‐CoV‐2 infectivity by about 2 and 3 logs, respectively. Our results suggest that low‐dose ozone, in the form of gas and water, is effective against SARS‐CoV‐2.