The virus life cycle Viral genome is encased in a package composed of proteins usually encoded by the nucleic acid, and serving the functions of preserving the genome until a new host is reached, and delivering it to the right site Protecting the genome while it is in the environment-Enteroviruses such as poliovirus, are able to survive passage through the high acidity of the stomach and infect the intestine, while closely related viruses such as the rhinoviruses are not The delivery system of the virion requires the recognition of a cell as a likely target, and this frequently involves a specific interaction between the virus and a particular cell surface moleculeThe virus life cycle • Viral genome is encased in a package composed of proteins usually encoded by the nucleic acid, and serving the functions of preserving the genome until a new host is reached, and delivering it to the right site. • Protecting the genome while it is in the environment – Enteroviruses, such as poliovirus, are able to survive passage through the high acidity of the stomach and infect the intestine, while closely related viruses such as the rhinoviruses are not. • The delivery system of the virion requires the recognition of a cell as a likely target, and this frequently involves a specific interaction between the virus and a particular cell surface molecule