France: is the great replacement actual?

It is so simple, no necessity of math schooling

What is the link between sickle cell disease and immigration?

https://en.wikipedia.org/wiki/Sickle-cell_disease

One of the consequences is the cost for caring persons with genetic mutation of haemoglobin.

https://books.google.fr/books?id=mZcWDgAAQBAJ&pg=PT8&lpg=PT8&dq=herve+le+bras+drepanocytose&source=bl&ots=owUCSU_d1P&sig=g737iQrO7hguSSJkF4nBx2eCM0U&hl=en&sa=X&ved=0ahUKEwj-mdukufzUAhUCLFAKHdSzDGYQ6AEIaDAL#v=onepage&q&f=false