What is biological immunity? What are its varieties?

The peculiarity of infectious diseases is that the human body, after recovery, acquires immunity to the re-introduction of the microorganism that caused the disease. This immunity is called immunity. From a biological point of view, immunity is a way of protecting the body’s internal constancy from living bodies or substances that carry signs of genetically foreign information. These bodies and substances are called antigens. These include pathogenic microorganisms, cells and tissues of your own body that have become alien, pollen, some plants and foods. In response to their introduction, the body begins to produce specific substances of a protein nature – antibodies. There are several types of immunity. Hereditary immunity is transmitted from parents to their child. Naturally acquired immunity is formed after a disease. Artificially acquired immunity is created by introducing into the human body a vaccine containing microorganisms weakened in any way, or already prepared antibodies in the form of serum or gamma globulin.

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