| dengue fever among u.s. travelers returning from the dominican republic - minnesota and iowa, 2008. | in february 2008, a group of u.s. residents became ill with symptoms and clinical findings suggestive of dengue fever after returning from the dominican republic, where they had traveled to work as missionaries. dengue is endemic in the dominican republic and most tropical and subtropical areas of the world, including the caribbean, and represents a known health risk for u.s. residents traveling to or working in those areas. subsequent investigation by the minnesota department of health (mdh), t ... | 2010 | 20520589 |