COVID-19 mortality rate highest North of 35 degrees latitude (Vitamin D)
Editorial: low population mortality from COVID‐19 in countries south of latitude 35 degrees North – supports vitamin D as a factor determining severity
Alimentary Pharmacology and Therapeutics 20 April 2020 https://doi.org/10.1111/apt.15777
Jonathan M Rhodes Sreedhar Subramanian Eamon Laird Rose Anne Kenny
European COVID-19 2nd wave start dates were associated with latitude (vitamin D), not temperature – Oct 31, 2020Multiple Sclerosis incidence is still associated with latitude – Nov 2019
Many diseases increase with latitude (low UV, Vitamin D) 
Celiac disease 5.4 times more likely in Northern vs Southern states (vitamin D) – Feb 2017
Many diseases increase with latitude (low UV, Vitamin D) Celiac disease 5.4 times more likely in Northern vs Southern states (vitamin D) – Feb 2017📄 Download the PDF from Vitamin D Life
San Marino is a microstate (pop 33,000) inside of Italy
