Diphtheria is a bacterial disease caused by Corynebacterium diphtheria. In this type of disease, A sheet of thick, grey matter covers the back of the throat, making breathing hard. Its symptoms include sore throat, mild fever, swollen lymph nodes and fatigue. Its treatment includes antibiotics such as antitoxin which helps into neutralize the diphtheria toxin. It spreads easily and very rarely prevented by the vaccine although, the vaccine is available.