She has a respiratory infection.

她有呼吸道感染。

The patient developed a nosocomial infection after surgery.

病人在手术后感染了医院获得的感染。

Macrophage accumulates at the site of infection to fight it.

巨噬细胞在感染部位积聚以对抗感染。

The infection spread to his bowels.

感染扩散到了他的内脏。

The medicine warded off the infection.

这种药物防止了感染。