Cough and ligt fever? Recently suffering from major infection?
Very possibly pneumonia.
Really, it isn’t necessarily Ebolavirus.
But maybe it is Enterovirus?
His blood was infested with ebola and likely he is/was anemic. This leaves the body open to all sorts of other infections as the blood supply is reinvigorated by the body’s own mechanism. In addition his body is still repairing the damage caused to it by ebola.
Long road back to normal ...