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Recently, far\u2010UVC radiation (222\u2009nm) emitted by KrCl* (krypton\u2010chloride) excimer lamps have been recommended for disinfecting high\u2010risk public spaces to reduce the presence and transmission of infectious viruses owing to limited human health exposure risks as compared to germicidal UVC (254\u2009nm). In this study, the UVC inactivation performances of individual filtered KrCl* excimer lamp (222\u2009nm) and germicidal UVC lamp (254\u2009nm) were determined against four viruses, bacteriophages MS2, Phi6, M13, and T4, having different genome compositions (ssRNA, dsRNA, ssDNA and dsDNA, respectively) and shapes (i.e., spherical (Phi6), linear (M13), and icosahedral (MS2 and T4)). Here, the disinfection efficacies of filtered KrCl* excimer lamp (222\u2009nm) and germicidal UVC lamp (254\u2009nm) were evaluated for highly concentrated virus droplets that mimic the virus\u2010laden droplets released from the infected person and deposited on surfaces as fomites. Filtered KrCl* excimer (222\u2009nm) showed significantly better inactivation against all viruses having different genome compositions and structures compared to germicidal UVC (254\u2009nm). The obtained sensitivity against the filtered KrCl* excimer (222\u2009nm) was found to be in the order, T4\u2009&gt;\u2009M13\u2009&gt;\u2009Phi6\u2009&gt;\u2009MS2 whereas for the germicidal UVC (254\u2009nm) it was T4\u2009&gt;\u2009M13\u2009&gt;\u2009MS2\u2009&gt;\u2009Phi6. These results provide a strong basis to promote the use of filtered KrCl* excimer lamps (222\u2009nm) in disinfecting contagious viruses and to limit the associated disease spread in public places and other high\u2010risk areas.<\/jats:p>","DOI":"10.1111\/php.13961","type":"journal-article","created":{"date-parts":[[2024,5,13]],"date-time":"2024-05-13T06:10:06Z","timestamp":1715580606000},"page":"147-156","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["<scp>Far\u2010UVC<\/scp> (222\u2009nm) irradiation effectively inactivates <scp>ssRNA<\/scp>, <scp>dsRNA<\/scp>, <scp>ssDNA<\/scp>, and <scp>dsDNA<\/scp> viruses as compared to\u00a0germicidal <scp>UVC<\/scp> (254\u2009nm)"],"prefix":"10.1111","volume":"101","author":[{"family":"Monika","sequence":"first","affiliation":[{"name":"Department of Biosciences and Bioengineering Indian Institute of Technology Bombay  Mumbai Maharashtra 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