> Also I suspect most of the countries on the map with low rates are not low with cancer rates but worse public health system. So not very telling
For southern countries, obviously. But the discrepancy between Western Europe (+ Australia and New Zealand) and US+Canada is quite intriguing to say the least.
I can imagine countries with poor healthcare and low life expectancy genuinely have less cancer incidence, because people die before they reach prime cancer age.
Edit: I found a paper: https://journals.viamedica.pl/nowotwory_journal_of_oncology/...