Inactivation times from 290 to 315 nm UVB in sunlight for SARS coronaviruses CoV and CoV-2 using OMI satellite data for the sunlit Earth.

ABSTRACT: UVB in sunlight, 290-315 nm, can inactivate SARS CoV and SARS CoV-2 viruses on surfaces and in the air. Laboratory exposure to ultraviolet irradiance in the UVC range inactivates many viruses and bacteria in times less than 30 min. Estimated UVB inactivation doses from sunlight in J/m² are obtained from UVC measurements and radiative transfer calculations, weighted by a virus inactivation action spectrum, using OMI satellite atmospheric data for ozone, clouds, and aerosols. For SARS CoV, using an assumed UVC dose near the mid-range of measured values, D ₉₀ = 40 J/m², 90% inactivation times T ₉₀ are estimated for exposure to midday 10:00-14:00 direct plus diffuse sunlight and for nearby locations in the shade (diffuse UVB only). For

SUBMITTER: Herman J 

PROVIDER: S-EPMC7490326 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature