Final answer:
EBV is mainly spread through contact with body fluids, and the clinical features include symptoms like fever, fatigue, lymph node swelling, and abdominal pain. The disease is self-limiting and can last for about a month, but fatigue can continue for several months. Complications in immunocompetent patients are rare but can occur.
Step-by-step explanation:
When uninfected young adults are exposed to EBV, they may experience infectious mononucleosis. The virus is mainly spread through contact with body fluids (e.g., saliva, blood, and semen). The main symptoms include pharyngitis, fever, fatigue, and lymph node swelling. Abdominal pain may also occur as a result of spleen and liver enlargement in the second or third week of infection. The disease typically is self-limiting after about a month. The main symptom, extreme fatigue, can continue for several months, however. Complications in immunocompetent patients are rare but can include jaundice, anemia, and possible rupture of the spleen caused by enlargement.