Immunology primarily deals with the host-pathogen interaction resulting in various developments within the body such as infections, inflammation and reaction that are inbuilt immune mechanism of the body to fight the foreign bodies. Microbiology is a field of study that mainly deals with the study of different microorganisms that cause diseases and the immune response of the host. The studies under this topic are mainly aimed at developing suitable anti-biotic, devise methods for detection and diagnosis of the infections, identify environmental contaminants, develop immunization vaccines, eradication of epidemic causing diseases and improve the treatment of various auto-immune disorders.