瘟疫在英语中通常称为 "pandemic"。它的来源可能源于希腊语 "pan-"，意思是 "全部"，和 "-demos"，意思是 "人民"，因此瘟疫就是指影响全部人民的疾病。

例句：

The COVID-19 pandemic has caused widespread illness and death around the world.（新冠疫情已经在全世界造成了广泛的疾病和死亡。）

The 1918 influenza pandemic, also known as the Spanish flu, was one of the deadliest pandemics in history.（1918年流感大瘟疫，也被称为西班牙流感，是历史上最致命的瘟疫之一。）

Pandemics can have a major impact on society and the economy.（瘟疫可能对社会和经济造成重大影响。）