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Using a comprehensive global dataset of daily COVID-19 cases and local environmental conditions, we find that increased daily ultraviolet (UV) radiation lowers the cumulative daily growth rate of COVID-19 cases over the subsequent 2.5 wk. Although statistically significant, the implied influence of UV seasonality is modest relative to social distancing policies. Temperature and specific humidity cumulative effects are not statistically significant, and total COVID-19 seasonality remains to be established because of uncertainty in the net effects from seasonally varying environmental variables.<\/jats:p>","DOI":"10.1073\/pnas.2012370118","type":"journal-article","created":{"date-parts":[[2020,12,16]],"date-time":"2020-12-16T20:40:49Z","timestamp":1608151249000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":115,"title":["Global evidence for ultraviolet radiation decreasing COVID-19 growth rates"],"prefix":"10.1073","volume":"118","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5518-0550","authenticated-orcid":false,"given":"Tamma","family":"Carleton","sequence":"first","affiliation":[{"name":"Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106-3151;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7202-8369","authenticated-orcid":false,"given":"Jules","family":"Cornetet","sequence":"additional","affiliation":[{"name":"D\u00e9partement de Sciences Sociales, \u00c9cole Normale Sup\u00e9rieure Paris-Saclay, 94235 Cachan Cedex, France;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3734-8145","authenticated-orcid":false,"given":"Peter","family":"Huybers","sequence":"additional","affiliation":[{"name":"Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5130-9583","authenticated-orcid":false,"given":"Kyle C.","family":"Meng","sequence":"additional","affiliation":[{"name":"Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106-3151;"},{"name":"Department of Economics, University of California, Santa Barbara, CA 93106-3151;"},{"name":"National Bureau of Economic Research, Cambridge, MA 02138;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8053-8828","authenticated-orcid":false,"given":"Jonathan","family":"Proctor","sequence":"additional","affiliation":[{"name":"Center for the Environment, Harvard University, Cambridge, MA 02138;"},{"name":"Data Science Initiative, Harvard University, Cambridge, MA 02138"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2020,12,28]]},"reference":[{"key":"e_1_3_5_1_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41586-020-2008-3"},{"key":"e_1_3_5_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmv.25735"},{"key":"e_1_3_5_3_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.367.6484.1294"},{"key":"e_1_3_5_4_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.ppat.0030151"},{"key":"e_1_3_5_5_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.02186-10"},{"key":"e_1_3_5_6_2","doi-asserted-by":"publisher","DOI":"10.1093\/aje\/kws259"},{"key":"e_1_3_5_7_2","doi-asserted-by":"publisher","DOI":"10.1186\/1476-069X-13-22"},{"key":"e_1_3_5_8_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.1812594116"},{"key":"e_1_3_5_9_2","first-page":"246","article-title":"Stability of SARS coronavirus in human specimens and environment and its sensitivity to heating and UV irradiation","volume":"16","author":"Duan S.","year":"2003","unstructured":"S. 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