Infectious Mononucleosis Mortality: Extremely Low

Death from infectious mononucleosis (EBV) is exceedingly rare—<1 case per year reported in the U.S. (CDC). Fatalities occur almost exclusively in:

  • Severe immunosuppression (post-transplant, HIV/AIDS).
  • Massive splenic rupture.
  • Airway obstruction from tonsillar hypertrophy.
  • Neurologic complications (encephalitis, Guillain-Barré).
  • Hemophagocytic lymphohistiocytosis (HLH).

For immunocompetent individuals, mono is self-limited; supportive care suffices.

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