Infectious mononucleosis ( IM ; also known as mono , glandular fever , Pfeiffer 's disease , Filatov 's disease , and sometimes colloquially as the kissing disease ( from its oral transmission ) is an infectious , widespread viral disease caused by the Epstein-Barr virus ( EBV ) , one type of herpes virus , against which over 90 % of adults are likely to have acquired immunity by the age of 40 .
Glandular Fever is a viral infection caused by the Epstein-Barr virus .