Infectious mononucleosis (mono), also known as glandular fever, is often referred to as the 'kissing disease'. The virus that causes this, known as the Epstein-Barr virus, is transmitted through contact with saliva, which is why it is so popular as the disease that can be contracted by kissing. The causes also include exposure to a cough or a sneeze, the sharing of a glass, silverware, such as spoons and forks, and even toothbrushes, with someone who already suffers from mononucleosis.