Viral infections are caused by viruses, which are very small organisms that usually hijack human(host) cells to make their own copy and replicate. Viral infections usually affect the respiratory and digestive systems but can target other parts of the body, too. Viruses can enter through various routes like eyes or breaks in the skin, and they utilize host machinery to reproduce. Thus spreading from one person to another for survival. Various medications are available to treat or mitigate viral infections, as some are curable and some are not.