A nurse in an emergency department is caring for a child who has a fever and fluid-filled vesicles on the trunk and extremities. Which of the following interventions should the nurse identify as the priority?

A. Encouraging oral fluids is an important intervention for a child who has a fever, as it helps prevent dehydration and electrolyte imbalance. However, it is not the priority intervention, as it does not address the risk of infection transmission to other clients or staff. C. Applying topical calamine lotion may help soothe the itching and discomfort caused by the vesicles, but it is not the priority intervention, as it does not prevent infection transmission or treat the underlying cause of the fever. B. Administering acetaminophen as an antipyretic may help reduce the fever and provide symptomatic relief for the child, but it is not the priority intervention, as it does not prevent infection transmission or treat the underlying cause of the fever. D. Initiating transmission-based precautions is the priority intervention, as it protects other clients and staff from exposure to the infectious agent that causes the vesicles and fever. The nurse should wear gloves, gown, mask, and eye protection when caring for the child, and place them in a private room or cohort them with other clients who have similar symptoms.