title: Early studies of viral hepatitis.
mesh_terms: D000818:Animals; D002986:Clinical Trials as Topic; D003951:Diagnostic Errors; D004196:Disease Outbreaks; D005243:Feces / Q000382:microbiology; D006506:Hepatitis A / Q000175:diagnosis / Q000382:microbiology; D006509:Hepatitis B / Q000209:etiology; D006801:Humans; D009305:Nasopharynx / Q000382:microbiology; D009626:Terminology as Topic; D065227:Transfusion Reaction; D006113:United Kingdom; D014611:Vaccination / Q000009:adverse effects