11. The song's lyrics were based on a bout with infectious mononucleosis suffered by Marshall. 12. It is best known as the cause of infectious mononucleosis ( glandular fever ). 13. Monocytosis has sometimes been called mononucleosis, but that name is usually reserved specifically for infectious mononucleosis . 14. Near the end of the year it became clear that she had struggled with infectious mononucleosis . 15. Suffering heavily from infectious mononucleosis , he ultimately missed the entire 1964 season, including the Olympic competition. 16. Cortisone is a common treatment for a severe sore throat that occurs commonly with EBV infectious mononucleosis . 17. Other possible causes and signs of the syndrome include migraines, use of hallucinogenic drugs, and infectious mononucleosis . 18. Elevated hepatic transaminase levels is highly suggestive of infectious mononucleosis , occurring in up to 50 % of patients. 19. When infection with EBV occurs during adolescence, it causes infectious mononucleosis 35 to 50 percent of the time. 20. Persons with infectious mononucleosis may be able to spread the infection to others for a period of weeks.