In fact, nine million people develop the active disease every year, and one in five will die. This places the tubercle bacillus second only to human immunodeficiency virus (HIV) on the list of top microbial killers.
我们喜欢将肺结核视为过去的顽症。事实上，每年都有九百万人发病，致死率高达五分之一。这意味着结核杆菌是仅次于艾滋病毒的第二号微生物杀手。