>>507496648 (OP)Only non whites get sickle cell disease, so this map shows that france was really brown even in 2018
Why? Sickle cell disease protects from malaria, so populations that live in malaria ridden regions have a higher chance of having it. That's why they screen for it in non whites.
"In France, screening is offered based on parental origin—specifically if at least one parent hails from a region where sickle‑cell disease (SCD) is common (e.g., sub‑Saharan Africa, North Africa, the Middle East, Southern Europe, India, or French overseas territories) "
So yeah France is already pretty brown and it will get browner…