After a forty-year hiatus, in 1981 dengue fever broke out anew in Liuchiu Rural Township, Pingtung County. About 8000 people were infected, some 80 % of the rural township's overall population.
其後經過四十年的沈寂，一九八一年登革熱又在屏東縣琉球鄉爆發，感染人數約有八千人，佔鄉民數的百分之八十。