In the years to follow, the ravages of yellow fever, malaria, typhoid fever, smallpox, pneumonia, dysentery, beriberi, food poisoning, snakebite, sunstroke, were only a shade less appalling. Ordinarily on the Isthmus, yellow fever came and went in cycles of two to three years. Now, unaccountably, it never went away and there was not a thing anyone could do. Malaria, ever present as always, remained the deadliest killer.
