90: percent of cases of infectious mononucleosis caused by the Epstein-Barr Virus (EBV)
95: percent of adults living in the United States between ages 35 and 40 who have been infected with EBV
35 to 50: percent likelihood that an adolescent infected with EBV will develop mononucleosis
Four to six: number of weeks after EPV infection the mononucleosis symptoms generally take to develop
One to four: number of weeks that mononucleosis symptoms usually last, although, in rare cases, symptoms can persist for months
Four: number of major symptoms -- including swollen glands, fatigue and fever -- that typically signify a case of mononucleosis
10: number of less common symptoms -- including sensitivity to light and puffy eyelids -- that can also signify a case of mononucleosis
Life: amount of time the virus remains in an infected person's body
