Beginning of Essay
Infectious -- known popularly as "mono" or "the kissing disease" -- has been recognized for more than a century. An estimated 90 percent of cases are caused by the Epstein-Barr virus (EBV), a member of the herpes virus group. Most of the remaining cases are caus ....

Middle of Essay
.... college students, the rate is several times higher. does not occur in any particular "season," although authorities in colleges and schools, where the disease has been well studied, report that they see most patients in the fall and early spring. Epidemics do not occur, but doctors have reported clustering of cases. Transmission: EBV, the virus that causes most cases of , infects and reproduces in the salivary glands. It also infects white blood cells called B cells. Direct contact with virus-infected saliva, such as through kissing, can transmit the virus and result in . Someone with , however, does not need to be isolated. Household members or co ....