从发表在《临床传染病》上的综合研究来看，自1930年确认第一例猪流感传染人类的病例以来，世界上被感染的人只有数十位。
According to a comprehensive study published in the journal Clinical Infectious Diseases, swine flu had infected only several dozen people in the world since it was first identified in 1930.
感染上禽流感的人类的死亡率是50%，但是迄今为止，被感染的人类大多数是通过与被感染鸟类的直接接触而传染上的。
Death rates for human infected are around 50 percent but, so far, humans have been infected mostly by direct handling with infected birds.
应用推荐