A member asked:

Why would i be positive for ebv/mono again after i had it when i was younger? don't u build immunity?

A doctor has provided 1 answer
Dr. Joram Seggev answered

Specializes in Internal Medicine - Allergy & Immunology

Antibody positive?: Once you have had the disease, certain antibodies to the virus continue to be found in the blood, quite often for life. During acute infections, additional antibodies develop. If you are only positive for antibodies and have no active disease, that's common. Also, the disease that we call "mono" (infectious mononucleosis) can be clinically caused by at lest 2 viruses (ebv and cmv).

Answered 9/28/2016

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