Final answer:
Nurses wear gowns to protect themselves and prevent the transmission of infections when performing tasks where blood or body fluids may get onto their clothing.
Step-by-step explanation:
When the nurse is performing tasks that may result in blood or body fluids getting onto their clothing, they should wear a gown as a form of personal protective equipment. These tasks may include handling specimens or equipment that are contaminated, working with infected patients, or assisting with invasive procedures. Wearing a gown helps to prevent the transmission of infections, such as AIDS or hepatitis, and ensures the safety of both the nurse and the patient.