Cusco altitude = 11,152 feet
COVID-19 cases per million inhabitants in the provinces of Peru
Map of Peru
Many of the COVID-19 infections are in tourists (who have not gotten lots of UVB), not locals
"....Cusco, 6.7 % of men are obese, compared to Lima, where 24.4 % are.""
Note - The highest altitude state in the US (with the most UVB) also has the lowest obesity
Hypothesis: Colorado has the best UV (and thus best health) in the US has the following chart