Does solar ultraviolet radiation play a role in COVID-19 infection and deaths? An environmental ecological study in Italy
Sci Total Environ. 2020 Nov 20;143757. doi: 10.1016/j.scitotenv.2020.143757
Giancarlo Isaia 1, Henri Diémoz 2, Francesco Maluta 3, Ilias Fountoulakis 2, Daniela Ceccon 4, Alcide di Sarra 5, Stefania Facta 6, Francesca Fedele 7, Giuseppe Lorenzetto 8, Anna Maria Siani 9, Gianluca Isaia 10
While the authors are clearly aware of the differences between UVB (which produces Vitamin D) and UV (UVA+ UVB) they only use UV data.
UVB has much stronger variations in intensity with season than UV.
If they were to have used UVB (Vitamin D) data, we suspect that the assocation with COVID-19 would be even stronger
Items in both categories Virus and UV are listed here:
- COVID and other Virus fought by UV - many studies
- Model discovered: More UV, less COVID (many excellent charts) – Sept 2022
- COVID hospital deaths reduced 2X by 8 days of UVB – pilot RCT May 2022
- UV and COVID: Prevention and perhaps treatment
- 11 percent fewer COVID-19 deaths if lockdowns had allowed sunshine – Nov 2021
- COVID-19 deaths - 30 percent fewer if high UVA (US, etc) – Aug 2021
- 4th highest county in the US has a very low COVID-19 rate (high UV, high vitamin D)
- COVID-19 onset strongly associated with latitude in Europe (Vitamin D)– Jan 21, 2021
- UV provides the best explanation of COVID-19 variation in Italy (74 pcnt) – Nov 2020
- More UVB, less Coronavirus – including SARS-CoV-2 – Aug 2020
- Less COVID-19 at high altitude due to more Vitamin D or other possible reasons – July 2020
- Far fewer COVID-19 deaths in the summer (Europe, Canada)
- High-altitude Cusco, Peru has far lower rate of COVID-19 than others (high UVB and Vitamin D) - June 2020
- Influenza Virus aerosols killed by 10 minutes of sunlight (far faster if use UV-C) – Nov 2019
- Influenza Virus aerosols killed by 10 minutes of sunlight (faster if use UVB, UVCC– Nov 2019
- Ultraviolet light kills cold and flu viruses, and generates Vitamin D in the skin
UV and D starts with
- Overview UV and vitamin D
- Vitamin D bulb for use in the home - or perhaps office,
- Sun and UV
- Sun and Vitamin D category has
333 items - UV and Vitamin D calculators, Vitamin D from low-cost UVB lamps
- UVB added in classroom reduced cavities, increased height, increased academics. etc
- How to safely get Vitamin D at home from a UV lamp or LED
- Vitamin D production after UVB exposure – A comparison of exposed skin regions – Feb 2015
- Ultra-low UV LED added to office desk lamp would add 7 ng to winter Vitamin D levels – RCT Oct 2022
- Seniors get about 4X less vitamin D from the sun or UVB
- Vitamin D from the sun without the heat (silver-coated plexiglass)
- COVID and other Virus fought by UV - many studies 16+
- 3.3 X more likely to be Vitamin D deficient if wear long-sleeves – Oct 2022
- Non-oral Vitamin D should be a better form for MS, food allergy, PTSD, etc. – many studies UV, etc.
Much more variation in UVB than UVA with season Brazil 2009Vitamin D varies with latitude - map of Chile has the following UV chart for Chile
See also web
- Global evidence for ultraviolet radiation decreasing COVID-19 growth rates - Jan 2021
Download the PDF from VitaminDWiki
NHR = Nursing Home ResidentsCOVID-19 deaths vs UV
A significantly stronger impact in mortality and morbidity by COVID-19 has been observed in the northern Italian regions compared to the southern ones. The reasons of this geographical pattern might involve several concurrent factors. The main objective of this work is to investigate whether any correlations exist between the spatial distribution of COVID-19 cases and deaths in the different Italian regions and the amount of solar ultraviolet (UV) radiation at the Earth's surface. To this purpose, in this environmental ecological study a mixed-effect exponential regression was built to explain the incidence of COVID-19 based on the environmental conditions, and demographic and pathophysiologic factors. Observations and estimates of the cumulative solar UV exposure have been included to quantify the amount of radiation available e.g., for pre-vitamin D3 synthesis or SARS-CoV-2 inactivation by sunlight. The analysis shows a significant correlation (p-value <5 × 10-2) between the response variables (death percentage, incidence of infections and positive tests) and biologically effective solar UV radiation, residents in nursing homes per inhabitant (NHR), air temperature, death percentage due to the most frequent comorbidities. Among all factors, the amount of solar UV radiation is the variable contributing the most to the observed correlation, explaining up to 83.2% of the variance of the COVID-19 affected cases per population. While the statistical outcomes of the study do not directly entail a specific cause-effect relationship, our results are consistent with the hypothesis that solar UV radiation impacted on the development of the infection and on its complications, e.g. through the effect of vitamin D on the immune system or virus inactivation by sunlight. The analytical framework used in this study, based on commonly available data, can be easily replicated in other countries and geographical domains to identify possible correlations between exposure to solar UV radiation and the spread of the pandemic.
List of 50 most-recent Virus pages in VitaminDWiki
- Vitamin D and COVID-19 - How much more evidence do we need - behind paywall July 2025
- COVID vaccination problems: 9 milllion Italians, etc. June 2025
- COVID and Long-COVID Association with Lower Vitamin D Levels - Perplexity AI June 2025
- COVID infection 5X more likely if under 40 ng of Vitamin D - Hollis May 2025
- Long-COVID may wear out the immune system (Vitamin D might restore it) - May 2025
- COVID-19 much less severe if pre-treat with a probiotic (Hamsters) - May 2025
- Vaccine efficacy - WHO 2021
- Increased risk of Childhood COVID: 4.9X if low Vitamin D, 3X if poor receptor - July 2025
- COVID Vaccination not safe - US Senate Hearing - May 2025
- " Kids and COVID" - book summary - May 2025
- COVID vaccination increased risk of autoimmune disease by 23% (teens in Israel) - May 2025
- A vaccination does not increase risk of Autism (nothing about multiple jabs) - May 2025
- Dengue fought by Vitamin D - review May 2025
- Many viruses deactivate the Vitamin D Receptor - perhaps measles too
- Months after 2nd COVID vaccination, emergency room visits increased 20% (100,000 Danish teens) - Jan 2025
- After COVID vaccination elderly 3.8 X more likely to live a year longer if higher Vitamin D - April 2025
- Influenza vaccination INCREASED chance of getting Influenza by 27% (57,000 people) - April 2025
- Childhood vaccinations are recommended, not mandatory - Japan since 1994
- COVID booster: 3.9 X better response if good levels of both Vitamin D and Zinc – March 2025
- Measles is a Nutritional Deficiency Disease (Vit D, Vit A, Zinc, etc) - March 2025
- COVID vaccination is safe during pregnancy - but they excluded all conceptions that did not result in a live birth - March 2025
- COVID is fought by Vitamin D via many different pathways – May 2025
- Compensation of COVID-19 vaccine injuries – US is poor, UK is even worse – April 2025
- 10 of the top 15 COVID treatments increase cellular Vitamin D
- Metformin appears to activate the Vitamin D Receptor (more D to kidney cells, etc,) - March 2025
- 4.4 X INCREASE in other respiratory infections in children with influenza vaccinations – RCT June 2012
- Children with Long-COVID 2.2 X more likely to have with low vitamin D – Feb 2025
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- Children who had COVID had 2.2 X higher risk of long COVID if had less than 30 ng of Vitamin D – Jan 2025
- Multiple Childhood Vaccinations increased autism risk by 4.4 X (Florida) – Jan 2025
- Over 48 Virus studies have RCT in the title
- COVID and 25 Vitamin D RCTs discussed – Jan 2025
- FLCCC new name: Independent Medical Alliance - Jan 2025
- Long-COVID reduced some by a small amount of Vitamin D and Vitamin K2 - RCT Jan 2025
- How vitamin D benefits normal organs and Long-COVID organs – Jan 2025
- TB vaccine 21X better at stopping COVID deaths than mRNA vaccines – Dec 2024
- Vaccination protected as much as 20 ng higher vitamin D (calves in this case) – May 2024
- 2 year study of COVID by US Congress - published Dec 2024
- Measles and low Vitamin D, Vitamin A
- COVID death rate is now similar to death rate from Influenza: CDC - Oct 2024
- COVIDIndex - over 1,000 publications - Oct 2024
- UK Vaccine: 50 years 6,500 claims, 944 awards - 4 years of COVID 16,000 claims, 180 awards (14% vs 1%) – Oct 2024
- COVID vaccine doesn't reduce risk of infection... but it will prolong the length of time you can spread COVID - Oct 2024
- Vitamin D preventing and treating COVID - 30,000 publications – Oct 2024
- Vitamin D deficiency increased in 2021 (Kuwait) - Oct 2024
- COVID Vaccines:"safe and effective" were two lies - Australian Senator - Oct 2024
UV provides the best explanation of COVID-19 variation in Italy (74 pcnt) – Nov 2020Printer Friendly Follow this page for updates6338 visitors, last modified 16 Dec, 2020, This page is in the following categories (# of items in each category)Attached files
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