The problem of viral hepatitis and its control in countries like Pakistan.
D003906:Developing Countries; D006506:Hepatitis A / Q000453:epidemiology; D006509:Hepatitis B / Q000453:epidemiology; D006525:Hepatitis, Viral, Human / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D010154:Pakistan