Toggle Health Problems and D

Breast Cancer vs latitude

from Gapminder.org
which allows you to plot a few health problems vs latitude
Breast Cancer is seen as strongly correlated with latitude, especially when you consider that many of the points at the equator, such as the red dot of the Philippines are people with dark skin, and so do not get as much vitamin D from the sun

from gapminder.org

VitaminDWiki - Vitamin D varies with latitude