Occasionally, travelers to tropical zones are infected with dengue, but dengue hemorrhagic fever is much rarer because this more serious form is normally contracted after a second dengue infection.
On juhtumeid, kus turistid on troopikapiirkondades haigestunud denguepalavikku, seevastu hemorraagilist denguepalavikku esineb palju harvemini, sest tavaliselt haigestutakse sellesse raskemasse haigusvormi pärast teistkordset dengueviirusega nakatumist.