Dengue and dengue haemorrhagic fever.
D000328:Adult; D003715:Dengue / Q000097:blood / Q000453:epidemiology* / Q000517:prevention & control / Q000821:virology; D006801:Humans; D011159:Population Surveillance; D012529:Saudi Arabia / Q000453:epidemiology; D016036:Seroepidemiologic Studies