MRCP2-2535

A 40-year-old traveler visited the Emergency department after returning from a trip to Thailand six weeks ago. During the examination, the patient had a fever (38.5°C), a diffuse macular rash, and generalised lymphadenopathy. Atypical lymphocytes were observed on a blood film. The patient had taken mefloquine as a malaria prophylaxis. What is the probable diagnosis?