@memecat28, welcome to Connect and thank you posting this question. Because my own knowledge is also limited, I did a bit of research on Mayo Clinic's website. I was able to find a response from James M. Steckelberg, M.D. of the infectious diseases department:

"Most cases of mononucleosis are caused by infection with the Epstein-Barr virus (EBV). Once you're infected with EBV, you carry the virus — usually in a dormant state — for the rest of your life. Periodically, however, the virus may reactivate. When this happens, the virus can be detected in your saliva — but you're not likely to become ill. Rarely, reactivated EBV may cause illness in people who have weak immune systems, such as those who have AIDS.

Mononucleosis rarely leads to a serious condition called chronic active EBV infection, which is characterized by persistent illness more than six months after the initial mononucleosis diagnosis."

I am not a medical professional, but I interpret reactivated as testing positive again but likely without symptoms and active EBV as having persistent symptoms that do not go away, which can be serious.

@memecat28, you mentioned you did your own research so I apologize if this is repeat information. If you don't mind sharing, are you currently experiencing symptoms?