流感 (liú gǎn) means “flu; influenza”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
冬天要注意预防流感。
Dōngtiān yào zhùyì yùfáng liúgǎn.
In winter, one should watch out for the flu.
Updated: 2026-07-18