Question

when should a gown be worn?
when you are wearing gloves
when the patient is hiv - positive
when contact with blood or bodily fluid is likely
when you are bathing a patient

Explanation:

Gowns are worn to protect against exposure to blood and bodily fluids. Wearing gloves doesn't always require a gown, bathing a patient doesn't always mean exposure to infectious substances, and just because a patient is HIV - positive doesn't necessarily mean contact with blood or bodily fluids is imminent.

Answer:

When contact with blood or bodily fluid is likely