The term "pathogenesis" refers to the process by which a disease begins and progresses. The harmony between the host and the virus determines it. The mechanics of an infectious disease's development, progression, and persistence or resolution are described by the term "pathogenesis." It is challenging to design, execute, and find strategies to avoid infection as well as to enhance patient outcomes following therapy without first having a thorough understanding of the etiology of an infectious disease at the cellular and molecular levels