Lack of production of interfering substances in infectious hepatitis.
D000998:Antiviral Agents / Q000032:analysis; D046508:Culture Techniques; D003588:Cytopathogenic Effect, Viral; D004622:Embryo, Mammalian; D006506:Hepatitis A / Q000175:diagnosis / Q000378:metabolism*; D006509:Hepatitis B / Q000378:metabolism; D006801:Humans; D007372:Interferons / Q000032:analysis*
D000998:Antiviral Agents; D007372:Interferons