A 32 year old man has been to Thailand and returned with cervical lymphadenopathy and fever. What is he most likely suffering from?

The key is B. EBV. [Cervical lymphadenopathy mentioned in question which occurs in EBV infection.

In ARS (acute retroviral syndrome) or primary HIV infection there is generalized lymphadenopathy.

Infectious mononucleosis, or mono, refers to a group of symptoms such as fever, sore throat, swollen

lymph glands in neck and armpits, headache, fatigue, muscle weakness, swollen tonsils, night sweats

usually caused by the Epstein-Barr virus (EBV). It typically occurs in teenagers, but you can get it at any

age. The virus is spread through saliva, which is why some people call it “the kissing disease.”].