“…As the frequency for SCD was estimated to be less than 0.5/1000 in the global population, and in order to reduce costs, it was decided that this screening would be restricted to newborns ‘at risk’, defined as those born to parents who both originated from regions with high risk for SCD. In France, the geographical origins for these high-risk communities are mainly sub-Saharan Africa, North Africa, the French West Indies and the Mediterranean area 3. Carrier frequency is highly variable from one minority group to another, as it ranges from 2% for North Africans to 20% for some of the sub-Saharan regions of Africa.…”