Antiviral drug therapy.
 Major advances in molecular virology have led to the development of new antiviral compounds.
 These drugs include ribavirin, used in the treatment of severe respiratory syncytial virus infection in children; amantadine, used in the prophylaxis and treatment of influenza A infection; acyclovir, used in a variety of herpesvirus infections, including primary gingivostomatitis, genital herpes and herpes zoster; ganciclovir, used in the treatment of retinitis due to cytomegalovirus, and zidovudine, used in the prophylaxis and treatment of human immunodeficiency virus infection.
