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.
Overview. Mononucleosis is a respiratory virus that affects the blood cells and salivary glands (glands responsible for producing saliva). Even though anyone can get mononucleosis, most people who get the illness are between the ages of 15 and 25. Mono can keep you out of work or school for several weeks or months.Mononucleosis, sometimes called mono, is caused by the Epstein-Barr virus, a member of the herpes family.verview. Mononucleosis is a respiratory virus that affects the blood cells and salivary glands (glands responsible for producing saliva). Even though anyone can get mononucleosis, most people who get the illness are between the ages of 15 and 25. Mono can keep you out of work or school for several weeks or months.