As in 1981 in Little Liuchiu, where the first outbreak occurred, and in Kanting, near Kaohsiung, during the epidemic there in 1988, geographic factors are paramount.
探究原因，正像民國七十年率先爆發流行的小琉球、以及七十七年大流行的高雄崁頂一樣，同樣是因為地理關係。