Again incomplete data. What was the race of the American in Wusan and what were the ages , race and underlying medical conditions of the others you mention. Such data is critically important to understand and allocate resources when dealing with any epidemic.
the American ws 60yo, no futher
the Brit was a white child, 24-25
the Africans, are most likely under 40, since most of Africa is under 40 because of decades of war
that’s all I got