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The viruses that caused smallpox (Variola major and Variola minor) are generally not stable in the environment (<24 hours as an aerosol), though they may persist for more than a decade within scabs Reviewed: Sinclair et. al., 2008 OSHA. UV light is an excellent disinfectant, so typically any virus exposed to sunlight will lose rapidly infectiousness. ...


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This is well documented in Advances in Microbial Physiology, Volume 16, Moseley and Williams, pages 116-117 (searchable via Google Books). Mattern et al. (1966) designated mutations that made E. coli Bs-1 sensitive to X-ray radiation as exr (X-ray sensitivity) mutations. That same year, Howard-Flanders and Boyce (1966) independently designated equivalent ...


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