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?:abstract
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Human coronaviruses are RNA viruses that are sensitive to ultraviolet (UV) radiation Sunlight contains UVA (320–400 nm), UVB (260–320 nm) and UVC (200–260 nm) action spectra UVC can inactivate coronaviruses, including severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) The incidence and mortality of coronavirus disease 2019 (COVID-19) are considered to be correlated with vitamin D levels Vitamin D synthesis in human skin is closely related to exposure to UVB radiation Therefore, the incidence and mortality of COVID-19 are also considered to be correlated with Vitamin D levels In this study, Spearman and Kendall rank correlation analysis tests were used to analyze the correlation between the average percent positive of five human coronaviruses (SARS-CoV-2, CoVHKU1, CoVNL63, CoVOC43, and CoV229E) in the U S and the corresponding sunlight UV radiation dose The results indicated that the monthly average percent positive of four common coronaviruses was significantly negatively correlated with the sunlight UV radiation dose The weekly percent positive of SARS-CoV-2 during April 17, 2020 to July 10, 2020 showed a significant negative correlation with the sunlight UV radiation dose in census regions 1 and 2 of the U S while no statistical significance in the other regions Additionally, sunlight UV radiation also showed some negative effects with respect to the early SARS-CoV-2 transmission
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