2 doctors weighed in:

Can you be a carrier of mono? And if so, if you are tested for mono will you always test positive?

2 doctors weighed in
Dr. Gurmukh Singh
Pathology
1 doctor agrees

In brief: Yes and yes

All people infected with mono carry the virus in their lymphocytes for the rest of their life, so in a way all are carriers of mono.
All normal people make antibodies to mono virus, i.e., ebv, and will test positive for life. See this site for more info. http://www.webmd.com/a-to-z-guides/infectious-mononucleosis-cause.

In brief: Yes and yes

All people infected with mono carry the virus in their lymphocytes for the rest of their life, so in a way all are carriers of mono.
All normal people make antibodies to mono virus, i.e., ebv, and will test positive for life. See this site for more info. http://www.webmd.com/a-to-z-guides/infectious-mononucleosis-cause.
Thank
Get help from a real doctor now
Dr. Peter Kurzweil
Board Certified,
48 years in practice
16M people helped
Continue
111,000 doctors available