Q. A 3-year-old boy is brought to the pediatric clinic by his mother, who reports a fever, cough, coryza, and conjunctivitis that started five days ago. The fever has spiked to 39°C (102.2°F), and the child seems more irritable than usual. The family recently traveled to a country where measles is endemic. The child's vaccination record is unclear, and the mother is unsure if he has received the MMR vaccine. On examination, you notice a generalized maculopapular rash that started at the hairline and is now spreading to the trunk and extremities. Koplik spots are observed inside the child's mouth. His respiratory and cardiovascular examination is unremarkable. The rest of the physical examination is normal. On laboratory findings, CBC shows that WBC is 4500/?L, Lymphocytes are 2500/?L, and CRP is 12 mg/L while Serum IgM antibody to measles virus is positive. What would be the most appropriate next step for management?