influenza

Health officials recommend getting an annual vaccination to prevent the spread of influenza.

(Chinese) 卫生官员建议每年接种疫苗，以防止流感的传播。

The global influenza pandemic of 1918 affected nearly one-third of the world's population.

(Chinese) 1918年的全球流感大流行影响了世界上近三分之一的人口。