Department of Community, Environment, and Policy, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ; Rocky Mountain Center for Occupational and Environmental Health, University of Utah, Salt Lake City, UT; Department of Family and Preventive Medicine, School of Medicine, University of Utah, Salt Lake City, UT.
Division of Environmental Health Sciences, College of Public Health, The Ohio State University, Columbus, OH.
Am J Infect Control. 2021 Jun;49(6):846-848. doi: 10.1016/j.ajic.2020.11.013. Epub 2020 Nov 15.
We used a quantitative microbial risk assessment approach to relate log disinfection reductions of SARS-CoV-2 bioburden to COVID-19 infection risks. Under low viral bioburden, minimal log reductions may be needed to reduce infection risks for a single hand-to-fomite touch to levels lower than 1:1,000,000, as a risk comparison point. For higher viral bioburden conditions, log reductions of more than 2 may be needed to achieve median infection risks of less than 1:1,000,000.
我们采用定量微生物风险评估方法，将 SARS-CoV-2 生物负荷的对数消毒减少与 COVID-19 感染风险联系起来。在低病毒生物负荷下，单次手到污染物接触的感染风险可能需要减少对数，以达到低于 1:1,000,000 的水平，作为风险比较点。对于更高的病毒生物负荷条件，可能需要超过 2 的对数减少才能达到低于 1:1,000,000 的中位数感染风险。
