Which of the following is classified as NOT a hospital-acquired infection?

Gunshot wounds are typically classified as traumatic injuries rather than infections. They result from an external source, such as a bullet, penetrating the body and causing physical damage, potentially leading to complications such as infection. However, the wound itself isn't acquired through the hospital setting; it occurs due to an external event. In contrast, the other options listed—pneumonia, urinary tract infections, and septicemia—can often be classified as hospital-acquired infections (HAIs) because they may develop as a direct result of receiving medical care, such as during prolonged hospital stays or as consequences of invasive procedures.