> Low population density, a largely outdoor existence,

I'm not sure that I buy that; cities in Africa have large dense slums, where it's going to be hard to distance. And crowded transport to/from work.

https://www.kulturevulturez.com/story-south-africa-slums-gan...

https://en.wikipedia.org/wiki/Kibera

https://en.wikipedia.org/wiki/Share_taxi