A (medical/formal) term for the common cold — symptoms caused by an upper respiratory viral infection.
医者は彼の症状を見て、軽い感冒だと診断した。
The doctor examined his symptoms and diagnosed a mild cold.
冬になると感冒が流行するので、手洗いやうがいを忘れないでください。
Colds become common in winter, so be sure to wash your hands and gargle.