16th August 2023

A 5-year-old boy is brought to your GP practice by his mother

A 5-year-old boy is brought to your GP practice by his mother. She reports that he’s been feverish for two days and has developed a pink maculopapular rash on his face and neck. The rash started behind his ears before spreading. He has been vaccinated as per the UK schedule. His mother adds that they recently attended a family gathering where a cousin visiting from abroad, who had not been vaccinated, also had similar symptoms.

What is the most likely diagnosis?