Caused by a common virus called herpes simplex (HSV-1), cold sores are contagious and can spread from person to person through skin-to-skin contact or by sharing items (such as eating utensils, lip balm, towels, cosmetics, and food), even when they aren't visible.
Infectious mononucleosis, or mono, refers to a group of symptoms usually caused by the Epstein-Barr virus (EBV). It typically occurs in teenagers, but you can get it at any age. People with mono often have a high fever, swollen lymph glands, and a sore throat.
Infectious mononucleosis is a common infection caused by the Epstein-Barr virus (EBV). It is also known as glandular fever, the kissing disease, and mono. Symptoms of infectious mononucleosis include fatigue, sore throat, fever, and swollen lymph nodes. There is no treatment for mono, but supportive care involves resting and drinking plenty of fluids. The illness resolves without treatment, but symptoms may last from several weeks to months.