Sunlight COVID-19 studies.
Recent:Abdelhafez Merow Jalaludin Heilingloh Hossain Biasin Blum.
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Jun 7 |
(Preprint) (meta analysis) | Sunlight for COVID-19: real-time meta analysis of 4 studies |
| Statistically significant improvements are seen for mortality and cases. 4 studies from 4 independent teams in 3 different countries show statistically significant improvements in isolation. • Meta analysis using the most serious outcom.. | ||
Jun 2 |
et al., Atmosphere, doi:10.3390/atmos14060973 | The Impact of Air Quality and Meteorology on COVID-19 Cases at Kuala Lumpur and Selangor, Malaysia and Prediction Using Machine Learning |
| Analysis of weather data, air quality, and COVID-19 in Malaysia, showing COVID-19 cases negatively correlated with solar radiation and positively correlated with air pollution. | ||
Apr 9 |
et al., medRxiv, doi:10.1101/2023.04.07.23288300 (Preprint) | Association between PM2.5air pollution, temperature, and sunlight during different infectious stages with the case fatality of COVID-19 in the United Kingdom: a modeling study |
| Modeling of COVID-19 cases in the UK predicting 69% lower mortality for one hour increased sunlight duration. The model predicts lower risk with increased sunlight exposure prior to about 7 days after infection, and increased risk after 7.. | ||
Jan 20 |
et al., International Journal of Environmental Research and Public Health, doi:10.3390/ijerph20031973 | Correlation between UV Index, Temperature and Humidity with Respect to Incidence and Severity of COVID 19 in Spain |
| Analysis of COVID-19 in 5 provinces in Spain, showing UV exposure negatively correlated with COVID-19 cases and hospitalization. | ||
Jan 18 |
et al., medRxiv, doi:10.1101/2023.01.16.23284634 (Preprint) | Prediction of Long COVID Based on Severity of Initial COVID-19 Infection: Differences in predictive feature sets between hospitalized versus non-hospitalized index infections |
| N3C retrospective identifying plant hardiness zone as a predictive variable for long COVID. Authors note that this may be due to sunlight/climate affecting the risk of long COVID, and plan more detailed analysis in future work. | ||
Dec 30 |
, M., The Open COVID Journal, doi:10.2174/26669587-v2-e221209-2022-24 | Higher Scores of Ambient Temperature, Sunshine Hours and UV Index are Associated with Lower COVID-19 Mortality |
| Analysis of COVID-19 deaths in 39 countries, showing mortality negatively correlated with sunshine hours. | ||
Nov 24 |
et al., Frontiers in Rehabilitation Sciences, doi:10.3389/fresc.2022.1037649 | Post-COVID-19 complications in home and hospital-based care: A study from Dhaka city, Bangladesh |
| Retrospective 925 COVID-19 patients in Bangladesh reporting that "physical activity and exposure to sunlight was positively associated with earlier recovery from COVID-19 both in home and hospital care". Details are not provided. | ||
Nov 16 |
et al., Scientific Reports, doi:10.1038/s41598-022-24024-9 | Effects of climatic factors on COVID-19 transmission in Ethiopia |
| Analysis of climate and COVID-19 transmission in Ethiopia, showing no association between sunshine duration and COVID-19 risk during the study period. Authors analyze cases only and not outcomes. | ||
Jun 30 |
et al., Journal of Photochemistry and Photobiology, doi:10.1016/j.jpap.2021.100107 | UV and violet light can Neutralize SARS-CoV-2 Infectivity |
| In Vitro study showing that UV irradiation is effective for SARS-CoV-2 inhibition at multiple wavelengths including UV-A and violet light. | ||
May 2 2021 |
et al., Journal of Advances in Microbiology Research, 3:1 | The effect of time exposure to sunlight on patients with COVID-19 |
| Survey of 120 COVID-19 cases in Iraq, showing lower risk of severe cases with sunlight exposure. | ||
Apr 26 |
et al., Southern African Journal of Infectious Diseases, doi:10.4102/sajid.v37i1.359 | Vitamin D status and COVID-19 severity |
| 58% fewer symptomatic cases [p=0.004]. Prospective study of 100 COVID-19 patients in South Africa, 50 with COVID-19 pneumonia and 50 asymptomatic, showing higher risk of symptomatic COVID-19 with lower exposure to sunlight, and with vitamin D deficiency. Sunlight exposure may .. | ||
Jan 27 |
, R., MedCram (Review) (Preprint) | The Case for Sunlight in COVID 19 Patients: Oxidative Stress |
| Review of potential benefits of sunlight for COVID-19 including improved vitamin D levels, the generation and regulation of melatonin, increased enery production in the mitochondria, and reduction in oxidative stress and Reactive Oxygen S.. | ||
Dec 31 2021 |
et al., Nat. Volatiles & Essent. Oils, 8:4 | Vitamin D Serum Levels and Its Association With COVID 19 Infection In Babylon Governorate, Iraq |
| 63% fewer cases [p=0.0002]. Analysis of 120 COVID-19 and 120 control patients in Iraq, showing lower risk of cases with regular sunlight exposure (3 times/week). | ||
Dec 3 2021 |
et al., The American Journal of Clinical Nutrition, doi:10.1093/ajcn/nqab389 | Associations between predicted vitamin D status, vitamin D intake, and risk of SARS-CoV-2 infection and Coronavirus Disease 2019 severity |
| 23% fewer cases [p=0.0001]. Analysis of 39,915 patients with 1,768 COVID+ cases based on surveys in the Nurses' Health Study II, showing higher UVA/UVB exposure associated with lower risk of COVID-19 cases. | ||
Oct 31 2021 |
et al., The Journal of Steroid Biochemistry and Molecular Biology, doi:10.1016/j.jsbmb.2021.105957 (Review) | Vitamin D-independent benefits of safe sunlight exposure |
| Review of the benefits of sunlight exposure independent of vitamin D. | ||
Oct 13 2020 |
et al., Proceedings of the National Academy of Sciences, doi:10.1073/pnas.2008590117 | Seasonality and uncertainty in global COVID-19 growth rates |
| Global analysis of COVID-19 cases and weather, showing increased UV light associated with a lower COVID-19 growth rate. | ||
Oct 5 2021 |
et al., FEBS Open Bio, doi:10.1002/2211-5463.13309 | Seasonal UV exposure and vitamin D: Association with the dynamics of COVID-19 transmission in Europe |
| Analysis of UV exposure in 26 European countries, showing that cloud-free vitamin D UV dose levels were negatively correlated with COVID-19 prevalence. | ||
Jul 7 2021 |
et al., International Journal of Environmental Research and Public Health, doi:10.3390/ijerph18147266 | Association of Food Intake Quality with Vitamin D in SARS-CoV-2 Positive Patients from Mexico: A Cross-Sectional Study |
| Retrospective 40 COVID+ patients in Mexico, showing vitamin D insufficiency associated with lower sun exposure. | ||
Jun 30 2021 |
et al., Annals of Medicine and Surgery, doi:10.1016/j.amsu.2021.102419 (Review) | COVID-19 and sunlight: Impact on SARS-CoV-2 transmissibility, morbidity, and mortality |
| Review of evidence for the benefits of sunlight exposure for COVID-19. | ||
Apr 8 2021 |
et al., British Journal of Dermatology, doi:10.1111/bjd.20093 | Ultraviolet A radiation and COVID-19 deaths in the USA with replication studies in England and Italy* |
| 32% lower mortality [p=0.004]. Analysis of UVA exposure and COVID-19 mortality in the USA, England, and Italy, showing increase UVA exposure associated with lower mortality. | ||
Feb 28 2021 |
et al., Science of The Total Environment, doi:10.1016/j.scitotenv.2020.143757 | Does solar ultraviolet radiation play a role in COVID-19 infection and deaths? An environmental ecological study in Italy |
| Retrospective COVID-19 cases and solar UV exposure in Italy, showing mortality and cases negatively correlated with solar UV exposure. | ||
Feb 5 2021 |
et al., The Journal of Infectious Diseases, doi:10.1093/infdis/jiab070 | UVB Radiation Alone May Not Explain Sunlight Inactivation of SARS-CoV-2 |
| Experiments have shown that SARS-CoV-2 is inactivated by sunlight much faster than predicted by theory, suggesting that additional mechanisms of inactivation may be involved. Authors note that sensitivity to wavelengths other than UVB mea.. | ||
Jan 9 2021 |
et al., Environmental Science and Pollution Research, doi:10.1007/s11356-020-12338-y | The effect of weather data on the spread of COVID-19 in Jordan |
| Analysis of COVID-19 and weather data in Jordan, showing solar radiation negatively correlated with COVID-19 cases. | ||
Dec 28 2020 |
et al., Proceedings of the National Academy of Sciences, doi:10.1073/pnas.2012370118 | Global evidence for ultraviolet radiation decreasing COVID-19 growth rates |
| 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. | ||
Nov 30 2020 |
et al., medRxiv, doi:10.1101/2020.11.28.20240242 (Preprint) | On the anti-correlation between COVID-19 infection rate and natural UV light in the UK |
| Analysis of COVID-19 cases in the UK, showing a correlation between increased UV radiation and lower COVID-19 cases. | ||
Oct 31 2020 |
et al., American Journal of Infection Control, doi:10.1016/j.ajic.2020.07.031 | Susceptibility of SARS-CoV-2 to UV irradiation |
| In Vitro study showing high infectious titer SARS-CoV-2 completely inactivated by UVC irradiation in 9 minutes. The UVC dose required for complete inactivation was 1,048 mJ/c. | ||
Oct 19 2020 |
et al., Scientific Reports, doi:10.1038/s41598-020-74825-z | Evidence of protective role of Ultraviolet-B (UVB) radiation in reducing COVID-19 deaths |
| Analysis of 152 countries suggesting that a permanent unit increase in UVI is associated with a 1.2 percentage points decline in daily growth rates of cumulative COVID-19 deaths. | ||
Sep 28 2020 |
et al., Environmental Science and Pollution Research, doi:10.1007/s11356-020-10930-w | COVID-19 pandemic: environmental and social factors influencing the spread of SARS-CoV-2 in São Paulo, Brazil |
| Analysis of COVID-19 in Brazil, showing a negative correlation between cases and UV radiation. | ||
Aug 31 2020 |
et al., Science of The Total Environment, doi:10.1016/j.scitotenv.2020.139016 | Sunlight exposure increased Covid-19 recovery rates: A study in the central pandemic area of Indonesia |
| Analysis of COVID-19 cases in Indonesia, showing recovery significantly correlated with sunlight exposure. | ||
Jul 23 2020 |
et al., Spatial and Spatio-temporal Epidemiology, doi:10.1016/j.sste.2020.100362 | Covid-19 and vit-d: Disease mortality negatively correlates with sunlight exposure |
| Analysis of COVID-19 mortality and sunlight exposure in continental metropolitan France, showing that average annual sunlight hours were significantly correlated with COVID-19 mortality, with a Pearson coefficient of -0.636. Also see the .. | ||
Jun 26 2020 |
et al., American Journal of Infection Control, doi:10.1016/j.ajic.2020.06.193 | COVID-19 fatalities, latitude, sunlight, and vitamin D |
| Analysis of 88 countries, showing a significant correlation between death rates and latitude, suggesting that sunlight exposure and vitamin D levels influence mortality. | ||
Jun 2 2020 |
et al., Research Square, doi:10.21203/rs.3.rs-32499/v1 (Preprint) | Sunlight and vitamin D in the prevention of coronavirus disease (COVID-19) infection and mortality in the United States |
| Analysis of COVID-19 cases in the USA reporting a potential relationship between latitude and the number of COVID-19 cases (p = 0.08) and deaths (p=0.06). Authors note that sunlight and vitamin D may reduce risk for COVID-19 cases and dea.. | ||
May 20 2020 |
et al., The Journal of Infectious Diseases, doi:10.1093/infdis/jiaa274 (In Vitro) | Simulated Sunlight Rapidly Inactivates SARS-CoV-2 on Surfaces |
| In Vitro study showing that simulated sunlight rapidly inactivates SARS-CoV-2 on surfaces. | ||
May 19 2020 |
et al., Clinical Infectious Diseases, doi:10.1093/cid/ciaa575 | Higher Solar Irradiance Is Associated With a Lower Incidence of Coronavirus Disease 2019 |
| Analysis of 359 countries and regions showing COVID-19 cases associated with reduced solar irradiance. | ||
Apr 17 2020 |
et al., Science of The Total Environment, doi:10.1016/j.scitotenv.2020.138705 | Investigation of effective climatology parameters on COVID-19 outbreak in Iran |
| Analysis of COVID-19 in Iran, showing cases inversely related to solar radiation, without statistical significance. | ||
Jul 31 2009 |
et al., Dermato-Endocrinology, doi:10.4161/derm.1.4.9063 | The possible roles of solar ultraviolet-B radiation and vitamin D in reducing case-fatality rates from the 1918–1919 influenza pandemic in the United States |
| Analysis of the 1918–1919 influenza pandemic for 12 US states, showing estimated UVB dose correlated with case fatality rates (p = 0.009) and with pneumonia as a complication of influenza (p = 0.005). | ||
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