The study of viruses at the molecular level is known as molecular virology. Viruses are small parasitic parasites that proliferate inside the cells of their hosts. Viruses have more biological diversity than the rest of the bacterial, plant, and animal kingdoms combined because they can successfully infect and parasitize a wide range of life forms, from microbes to plants and animals. Understanding how viruses interact with their hosts, replicate inside them, and because diseases require a deeper understanding of their diversity. Molecular and Cellular Biology of Viruses investigates virus research. The primary goals are to learn more about how these viruses interact with their hosts on a cellular and molecular level, as well as to find new antiviral targets.