Report of two cases of vivax malaria in U.S. soldiers and a review of malaria in the Republic of Korea.

This report describes two cases of vivax malaria in U.S. Army soldiers who acquired their infections at a training area in the Republic of Korea during 2012, but developed symptoms and were diagnosed more than six months later, long after they had returned to the United States. The report provides a historical perspective regarding the epidemiology of temperate climate vivax malaria, particularly in Korea, and relevant aspects of malaria prevention and control.