1918：“西班牙流感”H1N1大流行 1918: "Spanish flu" H1N1 Pandemic

　　最具破坏性的现代流感大流行，导致五十万美国人以及大约全球五千万人丧生，大约有20%至40%的世界人口受到感染。
The most devastating flu pandemic in modern times, killing more than 500,000 people in the United States, and some 50 million people worldwide. Somewhere between 20 and 40 percent of the global population was ill.

　　有些人早上感觉还不错，到中午病倒，傍晚就死了。

Some people who felt well in the morning became sick by noon and were dead by nightfall.

　　那些头几天还撑得住的病人，往往死于由细菌引起的流感并发症（比如肺炎）。那次的流行感冒不像典型的季节性流感，它不仅折磨着年幼和年老的人群，而且导致许多健康的年轻人的死亡。年龄在20至五十岁的成年人死亡率最高。
Those who did not succumb to the disease within the first few days often died of complications from the flu (such as pneumonia) caused by bacteria. Rather than just preying on the very young and old, as seasonal flus typically do, this one killed many healthy young adults, too: Mortality was highest among adults 20 to 50 years old.