2 doctors weighed in:
If my girlfriend had mono a long time ago and I haven't had it yet, does that mean I can get it now?
2 doctors weighed in

Dr. Robert Kwok
Pediatrics
1 doctor agrees
In brief: Maybe, maybe not
In a couple, where one had mono before, and the other did not, there are several possibilities.
Maybe the non-mono person caught ebv virus long ago with few symptoms, and now has immunity. Maybe the mono person had a mono-like illness but not from ebv, so she has no ebv to spread to the non-mono person. Since there is no way to stop the spread of ebv in a kissing couple, blood tests aren't needed.

In brief: Maybe, maybe not
In a couple, where one had mono before, and the other did not, there are several possibilities.
Maybe the non-mono person caught ebv virus long ago with few symptoms, and now has immunity. Maybe the mono person had a mono-like illness but not from ebv, so she has no ebv to spread to the non-mono person. Since there is no way to stop the spread of ebv in a kissing couple, blood tests aren't needed.
Dr. Robert Kwok
Dr. Robert Kwok
Thank
Dr. Carla Enriquez
Pediatrics
In brief: Maybe.
Maybe, but not from your girlfriend.
If you catch it, it's from someone else.

In brief: Maybe.
Maybe, but not from your girlfriend.
If you catch it, it's from someone else.
Dr. Carla Enriquez
Dr. Carla Enriquez
Thank
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