tetano
Editor, Senior Moderator
Photochem Photobiol
. 2020 Jun 5.
doi: 10.1111/php.13293. Online ahead of print.
Estimated Inactivation of Coronaviruses by Solar Radiation With Special Reference to COVID-19
Jose-Luis Sagripanti[SUP] 1 [/SUP], C David Lytle[SUP] 2 [/SUP]
Affiliations
Abstract
Using a model developed for estimating solar inactivation of viruses of biodefense concerns, we calculated the expected inactivation of SARS-CoV-2 virus, cause of COVID-19 pandemic, by artificial UVC and by solar ultraviolet radiation in several cities of the world during different times of the year. The UV sensitivity estimated here for SARS-CoV-2 is compared with those reported for other ssRNA viruses, including influenza A virus. The results indicate that SARS-CoV-2 aerosolized from infected patients and deposited on surfaces could remain infectious outdoors for considerable time during the winter in many temperate-zone cities, with continued risk for re-aerosolization and human infection. Conversely, the presented data indicate that SARS-CoV-2 should be inactivated relatively fast (faster than influenza A) during summer in many populous cities of the world, indicating that sunlight should have a role in the occurrence, spread rate, and duration of coronavirus pandemics.
Keywords: COVID-19; Influenza; SARS-CoV-2; UV radiation; antiviral effect; coronaviruses; photobiology; solar radiation; virus inactivation.
. 2020 Jun 5.
doi: 10.1111/php.13293. Online ahead of print.
Estimated Inactivation of Coronaviruses by Solar Radiation With Special Reference to COVID-19
Jose-Luis Sagripanti[SUP] 1 [/SUP], C David Lytle[SUP] 2 [/SUP]
Affiliations
- PMID: 32502327
- DOI: 10.1111/php.13293
Abstract
Using a model developed for estimating solar inactivation of viruses of biodefense concerns, we calculated the expected inactivation of SARS-CoV-2 virus, cause of COVID-19 pandemic, by artificial UVC and by solar ultraviolet radiation in several cities of the world during different times of the year. The UV sensitivity estimated here for SARS-CoV-2 is compared with those reported for other ssRNA viruses, including influenza A virus. The results indicate that SARS-CoV-2 aerosolized from infected patients and deposited on surfaces could remain infectious outdoors for considerable time during the winter in many temperate-zone cities, with continued risk for re-aerosolization and human infection. Conversely, the presented data indicate that SARS-CoV-2 should be inactivated relatively fast (faster than influenza A) during summer in many populous cities of the world, indicating that sunlight should have a role in the occurrence, spread rate, and duration of coronavirus pandemics.
Keywords: COVID-19; Influenza; SARS-CoV-2; UV radiation; antiviral effect; coronaviruses; photobiology; solar radiation; virus inactivation.