Thank you for the question. I also happen to be a “migratologist”.
Immigration and development, as we understand them today, should be wins both for the immigrant and the state that they are migrating from, because it has invested in the immigrant's education, and for the state that they are migrating to, because it is interested in the expertise brought to the community. That is how a win-win strategy should be considered.
As for the mobility of health care personnel, I would refer you to studies conducted by the World Health Organization that show that the answer is not to displace populations trained for the country of origin's community, but rather—as was done in Ghana and Zimbabwe—to have schools dedicated to training nurses for northern countries.
African countries and southern countries in general have their own public health strategies. People who are displaced from their home country have to be retrained when they come here. We need to have a strategy for training health care personnel destined for northern countries. There is no shortage of young African candidates.