I don't know if anyone has suggested this and the WHO and CDC probably already have, but, the children should be considered lacking enough IgG to fight off the infection. Comparing their IgG to that of healthy American children of a comparable age may indicate the need for an infusion of IgG if they fall ill.
There is also the issue of malnutrition during their journey and their stores of vitamins and minerals may be depleted, hence, perhaps IV lipids and amino acids and all the large molecules such as potassium and magnesium might be in order.
