Hospitalization can be required, especially for dengue hemorrhagic fever (DHF), a more severe and sometimes fatal form of the disease, but the good news is that dengue fever does not recur spontaneously, as does malaria.s it turns out, pretty high. * * *. Dengue fever (pronounced DENG-ee) is a common cause of illness in travelers returning to the United States from tropical areas, according to the Centers for Disease Control and Prevention.