Conv. Plasma
Nigella Sativa
Nitric Oxide
Peg.. Lambda

Home   COVID-19 treatment studies for Sunlight  COVID-19 treatment studies for Sunlight  C19 studies: Sunlight  Sunlight   Select treatmentSelect treatmentTreatmentsTreatments
Alkalinization Meta Lactoferrin Meta
Melatonin Meta
Bromhexine Meta Metformin Meta
Budesonide Meta Molnupiravir Meta
Cannabidiol Meta
Colchicine Meta Nigella Sativa Meta
Conv. Plasma Meta Nitazoxanide Meta
Curcumin Meta Nitric Oxide Meta
Ensovibep Meta Paxlovid Meta
Famotidine Meta Peg.. Lambda Meta
Favipiravir Meta Povidone-Iod.. Meta
Fluvoxamine Meta Quercetin Meta
Hydroxychlor.. Meta Remdesivir Meta
Iota-carragee.. Meta
Ivermectin Meta Zinc Meta

Other Treatments Global Adoption
All Studies   Meta Analysis   Recent:  
Global evidence for ultraviolet radiation decreasing COVID-19 growth rates
Carleton et al., Proceedings of the National Academy of Sciences, doi:10.1073/pnas.2012370118
Carleton et al., Global evidence for ultraviolet radiation decreasing COVID-19 growth rates, Proceedings of the National Academy of Sciences, doi:10.1073/pnas.2012370118
Dec 2020   Source   PDF  
  All Studies   Meta
Global analysis of UV radiation and COVID-19 cases, showing that higher UV radiation is associated with a lower daily growth rate of COVID-19 cases.
Carleton et al., 28 Dec 2020, multiple countries, peer-reviewed, 5 authors.
All Studies   Meta Analysis   Submit Updates or Corrections
This PaperSunlightAll
Global evidence for ultraviolet radiation decreasing COVID-19 growth rates
Tamma Carleton, Jules Cornetet, Peter Huybers, Kyle C Meng, Jonathan Proctor
With nearly every country combating the 2019 novel coronavirus (COVID-19), there is a need to understand how local environmental conditions may modify transmission. To date, quantifying seasonality of the disease has been limited by scarce data and the difficulty of isolating climatological variables from other drivers of transmission in observational studies. We combine a spatially resolved dataset of confirmed COVID-19 cases, composed of 3,235 regions across 173 countries, with local environmental conditions and a statistical approach developed to quantify causal effects of environmental conditions in observational data settings. We find that ultraviolet (UV) radiation has a statistically significant effect on daily COVID-19 growth rates: a SD increase in UV lowers the daily growth rate of COVID-19 cases by ∼1 percentage point over the subsequent 2.5 wk, relative to an average in-sample growth rate of 13.2%. The time pattern of lagged effects peaks 9 to 11 d after UV exposure, consistent with the combined timescale of incubation, testing, and reporting. Cumulative effects of temperature and humidity are not statistically significant. Simulations illustrate how seasonal changes in UV have influenced regional patterns of COVID-19 growth rates from January to June, indicating that UV has a substantially smaller effect on the spread of the disease than social distancing policies. Furthermore, total COVID-19 seasonality has indeterminate sign for most regions during this period due to uncertain effects of other environmental variables. Our findings indicate UV exposure influences COVID-19 cases, but a comprehensive understanding of seasonality awaits further analysis. COVID-19 | ultraviolet radiation | seasonality I n late 2019, a novel virus species from the family Coronaviridae, referred to as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began spreading throughout China (1). Central among SARS-CoV-2 concerns are its relatively high transmissivity and case fatality rates (2). In the ensuing months, the virus spread globally, prompting the World Health Organization to declare a pandemic on March 11, 2020. At the time of this writing, cases of COVID-19, the disease caused by SARS-CoV-2, have been detected in almost every country (Fig. 1A ), with the number of confirmed global cases in the tens of millions. Much remains unknown about COVID-19. An important question concerns how environmental conditions modify COVID-19 transmission. In particular, sensitivity to environmental conditions that vary seasonally may allow prediction of transmission characteristics around the globe over the coming months and have implications for seasonal reemergence of infections (3). Prior evidence from a few other viruses suggests the possibility of COVID-19 seasonality. For instance, H3N2, 2009 H1N1, and other strains of influenza exhibit sensitivity to local temperature and specific humidity (4-8). Furthermore, related strains of coronavirus and..
Anderson, Relman, Walt, Rapid Expert Consultation on SARS-CoV-2 Survival in Relation to Temperature and Humidity and Potential for Seasonality for the COVID-19 Pandemic
Araujo, Naimi, likely to be constrained by climate, doi:10.1101/2020.03.12.20034728
Auffhammer, Hsiang, Schlenker, Sobel, Using weather data and climate model output in economic analyses of climate change, Rev. Environ. Econ. Pol
Backer, Klinkenberg, Wallinga, Incubation period of 2019 novel coronavirus (2019-nCoV) infections among travellers from Wuhan
Baker, Yang, Vecchi, Metcalf, Grenfell, Susceptible supply limits the role of climate in the early SARS-CoV-2 pandemic, Science
Barreca, Shimshack, Absolute humidity, temperature, and influenza mortality: 30 years of county-level evidence from the United States, Am. J. Epidemiol
Barreca, Shimshack, Absolute humidity, temperature, and influenza mortality: 30 years of county-level evidence from the United States, Am. J. Epidemiol
Bright, Coleman, Rose, Urban, LandScan
Britton, Pardoux, Stochastic Epidemic Models with Inference
Bukhari, Jameel, Will coronavirus pandemic diminish by summer
Burke, Hsiang, Miguel, Global non-linear effect of temperature on economic production, Nature
Carleton, Hsiang, Social and economic impacts of climate, Science
Chen, Roles of meteorological conditions in COVID-19 transmission on a worldwide scale, doi:10.1101/2020.03.16.20037168
Cohen, None, Sick time. Science
Conticini, Frediani, Caro, Can atmospheric pollution be considered a co-factor in extremely high level of SARS-CoV-2 lethality in Northern Italy?, Environ. Pollut
Darnell, Subbarao, Feinstone, Taylor, Inactivation of the coronavirus that induces severe acute respiratory syndrome, SARS-CoV, J. Virol. Methods
Dell, Jones, Olken, Temperature shocks and economic growth: Evidence from the last half century, Am. Econ. J. Macroecon
Dell, Jones, Olken, What do we learn from the weather? The new climate-economy literature, J. Econ. Lit
Desch Ênes, Greenstone, Climate change, mortality, and adaptation: Evidence from annual fluctuations in weather in the US, Am. Econ. J. Appl. Econ
Deschenes, Moretti, Extreme weather events, mortality, and migration, Rev. Econ. Stat
Dong, Du, Gardner, An interactive web-based dashboard to track COVID-19 in real time, Lancet Infect. Dis
Duan, Stability of SARS coronavirus in human specimens and environment and its sensitivity to heating and UV irradiation, Biomed. Environ. Sci
Gao, Schmoldt, Slusser, UV Radiation in Global Climate Change
Graff Zivin, Neidell, Temperature and the allocation of time: Implications for climate change, J. Labor Econ
Hale, Petherick, Phillips, Webster, Variation in government responses to COVID-19: Version 4
Hamilton, Time Series Econometrics
Hauser, Estimation of SARS-CoV-2 mortality during the early stages of an epidemic: A modelling study in Hubei, doi:10.1101/2020.08.20.20177311
Hsiang, Climate econometrics, Annu. Rev. Res. Econ
Hsiang, Jina, The causal effect of environmental catastrophe on longrun economic growth: Evidence from, doi:10.3386/w20352
Hsiang, Meng, Cane, Civil conflicts are associated with the global climate, Nature
Hsiang, Temperatures and cyclones strongly associated with economic production in the Caribbean and Central America, Proc. Natl. Acad. Sci. U.S.A
Hsiang, The effect of large-scale anti-contagion policies on the COVID-19 pandemic, Nature
Ianevski, Low temperature and low UV indexes correlated with peaks of influenza virus activity in Northern Europe during 2010-2018, Viruses
Jaakkola, Decline in temperature and humidity increases the occurrence of influenza in cold climate, Environ. Health
Jiang, Rayner, Luo, Does SARS-CoV-2 has a longer incubation period than SARS and MERS?, J. Med. Virol
Kaashoek, Santillana, evolution of the epidemic or an indicator of local testing capabilities? A case study in the United States
Lauer, The incubation period of coronavirus disease 2019 (COVID-19) from publicly reported confirmed cases: Estimation and application, Ann. Intern. Med
Li, Early transmission dynamics in Wuhan, China, of novel coronavirusinfected pneumonia, N. Engl. J. Med
Li, Substantial undocumented infection facilitates the rapid dissemination of novel coronavirus (SARS-CoV2), Science
Lowen, Mubareka, Steel, Palese, Influenza virus transmission is dependent on relative humidity and temperature, PLoS Pathog
Missirian, Schlenker, Asylum applications respond to temperature fluctuations, Science
Moore, Obradovich, Lehner, Baylis, Rapidly declining remarkability of temperature anomalies may obscure public perception of climate change, Proc. Natl. Acad. Sci. U.S.A
Nie, Epidemiological characteristics and incubation period of 7015 confirmed cases with coronavirus disease 2019 outside Hubei province in China, J. Infect. Dis
O'reilly, Effective transmission across the globe: The role of climate in COVID-19 mitigation strategies, Lancet Planet. Health
O'reilly, Effective transmission across the globe: The role of climate in COVID-19 mitigation strategies, Lancet. Planet. Health
Ogen, Assessing nitrogen dioxide (NO2) levels as a contributing factor to the coronavirus (COVID-19) fatality rate, Sci. Total Environ
Qian, Indoor transmission of SARS-CoV-2, Indoor Air, doi:10.1111/ina.12766
Ratnesar-Shumate, Simulated sunlight rapidly inactivates SARS-CoV-2 on surfaces, J. Infect. Dis
Reich, A collaborative multiyear, multimodel assessment of seasonal influenza forecasting in the United States, Proc. Natl. Acad. Sci. U.S.A
Sachs, Warner, Fundamental sources of long-run growth, Am. Econ. Rev
Schlenker, Roberts, Nonlinear temperature effects indicate severe damages to U.S. crop yields under climate change, Proc. Natl. Acad. Sci. U.S.A
Setti, SARS-Cov-2RNA found on particulate matter of Bergamo in Northern Italy: First evidence, Environ. Res
Seyer, Sanlidag, Solar ultraviolet radiation sensitivity of SARS-CoV-2, Lancet Microbe
Shi, The impact of temperature and absolute humidity on the coronavirus disease 2019 (COVID-19) outbreak -Evidence from China, doi:10.1101/2020.03.22.20038919
Steel, Palese, Lowen, Transmission of a 2009 pandemic influenza virus shows a sensitivity to temperature and humidity similar to that of an H3N2 seasonal strain, J. Virol
Sun, Chen, Viboud, Early epidemiological analysis of the coronavirus disease 2019 outbreak based on crowdsourced data: A population-level observational study, Lancet Digit. Health
Sun, Clinical characteristics of hospitalized patients with SARS-CoV-2 infection: A single arm meta-analysis, J. Med. Virol
Wang, High temperature and high humidity reduce the transmission of COVID-19
Wooldridge, Econometric Analysis of Cross Section and Panel Data
Wu, A new coronavirus associated with human respiratory disease in China, Nature
Wu, Nethery, Sabath, Braun, Dominici, Air pollution and COVID-19 mortality in the United States: Strengths and limitations of an ecological regression analysis, Sci. Adv
Please send us corrections, updates, or comments. Vaccines and treatments are complementary. All practical, effective, and safe means should be used based on risk/benefit analysis. No treatment, vaccine, or intervention is 100% available and effective for all current and future variants. We do not provide medical advice. Before taking any medication, consult a qualified physician who can provide personalized advice and details of risks and benefits based on your medical history and situation. FLCCC and WCH provide treatment protocols.
  or use drag and drop