In this respect, Ebola is – or, rather, was – an example of what is sometimes referred to as the 90/10 rule: 90% of medical research is directed toward illnesses that comprise only 10% of the global burden of disease. The world has known about the deadly nature of the Ebola virus since 1976; but, because its victims were poor, pharmaceutical companies had no incentive to develop a vaccine.
从这个角度看，埃博拉是&mdash;&mdash;或者说曾经是&mdash;&mdash;有时被称为90/10法则的一个例子：90%的医学研究被用于只占全球疾病负担10%的疾病。世界从1976年就知道埃博拉病毒具有致命性；但是，由于受害者都是穷人，制药公司没有动力研发疫苗。事实上，制药公司治疗男性秃顶还能多赚一点儿。