The infections affect as many as 6 percent of all hospital patients, according to some estimates.

Bacterial infections may affect the upper or lower respiratory system.

An infected newborn's health problems are generally more severe when the infection affects several body systems.

The infection has affected his speech, and now he gropes for words.

In humans, infection is rare and usually only affects splenectomized patients.

A particularly harmful aspect of this worm is that a single infection can affect an entire network.

Most often, the infection affects the middle ear and is called otitis media.

The infection was affecting nerves in both her legs.

Chronic infections can affect people of any age, health, or immune status.