2 doctors weighed in:

What is the long term consequences of having an extreme form of mono at the age of 12?

2 doctors weighed in
Dr. Martin Raff
Internal Medicine - Infectious Disease
1 doctor agrees

In brief: Very little

Although not knowing what you mean by an extreme form of mono, once having recovered from this it is not likely to create long=term issues.

In brief: Very little

Although not knowing what you mean by an extreme form of mono, once having recovered from this it is not likely to create long=term issues.
Thank