Statistics from the World Health Organization (WHO) showed that there were 50 to 100 million cases of DF, 250 to 500 thousand cases of DHF, among them 24 thousand died of infection.

• 世界卫生组织估计全球每年DF发病人数约5千万到1亿，并导致25至50万DHF病例和2.；4万人死亡。