Immunology is the study of the immune response. It has tremendous advances in the last 3 decades. In Latin “Immunitis” means “Freedom from Burdens” It is the slogan of second world war soldiers. The Father of Immunology and microbiology is Louis Pasteur” (1822 to 1895).
Animal encounter many potentially dangerous microbes in air, water and food. They have evolved co-operative types of defense mechanism against the disease causing microbes. These mechanisms maintain homeostasis to keep the animals alive. Infact human body is a closed container. If a parasite is to establish it must first penetrate the layer of this container. Intact skin and its extension into the gastrointestinal, respiratory and urinary tracts represent the major form of infection and diseases.
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