Mononucleosis (mono) is a clinical syndrome that usually results from infection with the Epstein Barr virus (EBV). Classic symptoms are a sore throat and swollen lymph nodes especially in the neck.
Technically, yes, mono can be considered a sexually transmitted infection (STI). But that’s not to say that all cases of mono are STIs. Mono, or infectious mononucleosis as you might hear your doctor ...