Q. A 6-year-old boy presents to the primary care clinic by his mother with complaints of a rash on the face and trunk. His mother reports that prior to the rash, the child had upper respiratory symptoms, including nasal congestion and a mild fever. The physical examination reveals a red, flushed "slapped cheek" appearance on the face and a maculopapular rash on the trunk and limbs. He has clear lung sounds, and a normal heart rate and rhythm without rubs or murmurs. His temperature is 100.8°F, and all other vital signs are stable. Which of the following is the most effective management for the suspected diagnosis?