Repatriation
I don't think that repatriation of a known victim is the main worry here.
We should be concerned that some mate with dual US citizenship got as far as Lagos Airport before dying. There will be others who when they realise they are ill may try and seek better treatment in Europe, the US or Asia.
Health tourism might take on a whole new slant in the uk if someone slips through the net and turns up at a busy A and E department and sits waiting for a few hours.