Fighting COVID-19: Walking on Sunshine By: Neil Siskind

By: Neil S. Siskind


My Objective

To determine if there is an inverse correlation (or, a negative correlation) between the amount of sunshine, temperature, and UV radiation levels in a given community (a city, town, village, state, nation, etc.) and the resulting vitamin D levels (vitamin D3) found in people in that community, and the number of people in that community infected with COVID-19, such that a high amount of sunshine, high temperatures, high UV radiation levels, and healthy vitamin D levels (vitamin D sufficiency) equate to fewer COVID-19 infections.

Put another way, do high UV radiation levels and high temperatures in a community (a city, town, village, state, nation, etc.), and healthy vitamin D levels (vitamin D sufficiency) in people in a community, help protect those people from contracting COVID-19; and, do low UV radiation levels and low temperatures in a community (a city, town, village, state, nation, etc.), and low vitamin D levels (vitamin D deficiency) in people in a community, leave the people in such community vulnerable to COVID-19 infections?

Analysis- States and Countries: Populations, Temperatures, and Cases

States: data, and my analysis

The seven most populous U.S. states, in order, with tomorrow’s temperatures (in Fahrenheit)

1.      California- Los Angeles, 75 degrees

2.      Texas- Houston, 80 degrees

3.      Florida- Miami, 85 degrees

4.      New York- NYC, 61 degrees (and cloudy)

5.      Pennsylvania- Philadelphia, 55 degrees

6.      Illinois- Chicago, 49 degrees

7.      Ohio- Columbus, 48 degrees


The seven U.S. states with the greatest number of COVID-19 cases, in order

1.      New York

2.      New Jersey (Tuesday temperature, Newark, 61 degrees)

3.      Massachusetts (Tuesday temperature, Boston, 55 degrees)

4.      Pennsylvania

5.      California

6.      Michigan (Tuesday temperature, Detroit, 41 degrees)

7.      Illinois

What’s missing, based on size? The highest temperature states- Texas & Florida. California is below four other states, even though it’s the most populous.

What states are on the list, even though they’re not one of the most populous? New Jersey, Massachusetts, and Michigan. Note: Detroit’s Black/African American population is 82% of Detroit’s total population. African/black Americans (and senior citizens) have the highest overall vitamin D deficiencies of any group.

Eighth on the above list (not shown) is Florida- yet, Florida is more populous than every state on the list, save for California, and Florida has a very large elderly population. In fact, Florida may have only made it to eighth on the list because of that; otherwise, it would probably be much lower on the list.

Countries: data, and my analysis

The eight largest countries in the world, by population, in order, with tomorrow’s temperatures (in Fahrenheit)

1.      China- Beijing, 55 degrees

2.      India- Mumbai, 93 degrees

3.      United States- D.C., 63 degrees (and cloudy)

4.      Indonesia- Jakarta, 91 degrees

5.      Pakistan- Islamabad, 81 degrees

6.      Brazil- San Paolo, 80 degrees

7.      Nigeria- Abuja, 97 degrees

8.      Bangladesh- Dhaka, 85 degrees


The eight countries having the greatest number of COVID-19 cases, in order, with tomorrow’s temperatures (in Fahrenheit)

1.      United States- D.C., 63 degrees

2.      Spain- Madrid, 58 degrees

3.      Italy- Rome, 68 degrees

4.      France- Paris, 73 degrees

5.      Germany- Berlin, 64 degrees

6.      UK- London, 63 degrees

7.      Turkey- Istanbul, 55 degrees

8.      China (probably should be higher on the list)- Wuhan, 63 degrees

What’s missing, based on size? The highest temperature countries- India, Pakistan, Nigeria, Bangladesh, Indonesia, and Brazil- even though they’re all more populous than all the European nations on the list. They are all over 80 degrees this time of year.

Most every country on the “biggest population” list is missing from the “highest cases” list- and they are all warm weather nations. The lesser populated nations (European nations) on the “most cases” list have cold, damp winters.


Larger population states, such as Florida and Texas, known for their warm and sunny conditions, are surpassed in number of COVID-19 cases by smaller population states, such as Massachusetts and Michigan, known for their gray and gloomy winters. Larger population countries, such as India and Brazil, known for their hot weather, are surpassed in number of COVID-19 cases by smaller population countries, such as the U.K. and Germany, countries hardly recognized for their warm and sunny climates.

It’s worth noting that Taipei, Taiwan, the world’s reference point for how to successfully fight COVID-19, will be 77 degrees tomorrow.

From these data points, can it be denied that sunshine quantity, UV radiation levels, temperature, and vitamin D (specifically, vitamin D3) levels, and COVID-19, are inversely correlated? Further research, testing, and analysis is strongly encouraged.

A 2012 study published in the American Journal of Respiratory and Critical Care Medicine on vitamin D deficiency, smoking, and lung function, concluded the following:

“Vitamin D deficiency was associated with lower lung function and more rapid lung function decline in smokers over 20 years in this longitudinal cohort of elderly men. This suggests that vitamin D sufficiency may have a protective effect against the damaging effects of smoking on lung function. Future studies should seek to confirm this finding in the context of smoking and other exposures that affect lung function.”

All COVID-19 diagnoses should include a check of patients’ vitamin D levels- a simple and effective way to help prove or disprove my “temperature/UV radiation level/vitamin D level – COVID-19 infections” inverse correlation theory.




See these studies of vitamin D’s relationship with, and effect on, pathogens and infections:

The Role of Vitamin D in Prevention and Treatment of Infection

Vitamin D Status and the Host Resistance to Infections: What Is Currently Not Understood.



About the Writer

Restructure and reduce business and personal debts; collect debts owed; monetize receivables by selling your invoices:

Monetize your accounts receivables today with Receivable Advance™

Neil Siskind is: President of The Siskind Law Firm,, focused on debt negotiation and restructuring, debt collection, debt investing, product investments, trademark licensing, and product distribution; Founder & Chairman of The Fatherhood Assignment™, a think tank and advocate for children with absentee fathers; Founder of the global charity marketing initiative, Caring is Free®; Founder of National Fatherhood Day™; Owner & Conservator of The Neil S. Siskind Nature Preserve, over 9 acres of conserved waterfront land along New York’s majestic Hudson River; and author of The Complete Guide To The Ways To Manufacture & Sell Your Products. On December 11, 2017, in his article The Yield Curve Speaketh: Why Stocks Might Crash in Early 2018, Neil Siskind accurately predicted the February, 2018 stock crash, the largest single-day point drop in the Dow Jones Industrial Average’s history. All the stock indices are down approximately 6% for 2018. In his September 26, 2018 article, Lots of “Bull” In The Bull Market: Let’s Look At What’s “Really” Growing, Neil Siskind explained that, despite Wall Street’s bullishness, the economic data and stock market underpinnings were in decline, and the economy and stocks were at imminent risk. By the closing of markets on October 23, 2018, the S&P 500 had fallen approximately 7%, with October being the S&P’s worst month since August 2015 (and December being the S&P’s worst month ever), the Nasdaq continues to have its worst month since 2016, and is down approximately 8% from article publication, and the DJIA is having its worst monthly performance since 2008. In 2018, Neil Siskind coined the phrase “synchronized global slowth™” (or “synchronous slowth™”) to describe the occurrence or condition of multiple emerging market and developed market economies commencing a downward trajectory of economic and GDP growth, or actually contracting to a point of slow, stagnant, or negative economic and GDP growth, simultaneously. If you are in need of office space in South Florida, contact Neil Siskind about space availability at The Siskind Executive Office Complex in Boca Raton, FL.

Other Recent Articles by Neil S. Siskind:

Settle Debts, Restructure Debts, Collect Debts, Sell Receivables: Debt Solutions From The Siskind Law Firm- 

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