The silent killer in WWII-An unexpected enemy.

Of all the enemies Allied soldiers confronted during World War II, malaria proved to be among the most stubborn. The mosquito-borne disease was a constant scourge for soldiers stationed in the Pacific and Mediterranean theaters. General MacArthur’s retreat to the malarial Philippine peninsula of Bataan in early 1942 led directly to his sickly army’s surrender to the Japanese a few months later. The illness continued to cripple American forces during the ensuing campaigns in Papua New Guinea and Guadalcanal, where it was so rampant that a division commander ordered that no Marine be excused from duty without a temperature of at least 103°F.

Troops in Southern Europe faced similar problems. During the Seventh Army’s Sicilian campaign from July to September 1943, 21,482 soldiers were admitted to the hospital for malaria; 17,535 were admitted for battle casualties. All in all, malaria accounted for almost a half-million hospital admissions and more than 300 American deaths during the war.