Many diseases increase with latitude (low UV, Vitamin D) On this page Lower Type 1 Diabetes and Cancer Rates Associated with Higher UVB Grassroots Health May 2019 See also VitaminDWiki COVID-19 mortality rate highest North of 35 degrees latitude (Vitamin D) – April 20, 2020 IBD Crohn’s disease Esophageal Cancer Brain cancer Non-melanoma skin cancer Headaches Autoimmune Rheumatoid Arthritis Hip fracture Autism Dementia Mortality Multiple Sclerosis Reasons why latitude gradients are disappearing Vitamin D varies with latitude - map of Chile contains the following