Immunology and Virology Diseases

General Virology

A virus is an binding intracellular parasite, which means that it can live only within the host cell and also depends on it for reproduction and metabolic processes, for example protein synthesis. Generally Viruses can be categorized depending on their genome (DNA or RNA) or several structural components, like capsid, the envelope, and viral receptor proteins. The viral replication cycle occurs within the host cell and engages attachment to and penetration of the host cell, uncoating and replication of the nucleic acid, synthesis of virus proteins, congregation of the components, and also provides a new viruses via budding or cell lysis. This procedure of nucleic acid replication are differs among DNA and RNA viruses. The host body has different physical and immunological defense mechanisms to inactivate and eliminate viruses.