Failure to detect an antigen associated with hepatitis in a community epidemic.
D004796:Clinical Enzyme Tests; D004196:Disease Outbreaks / Q000276:immunology*; D004812:Epidemiologic Methods; D006506:Hepatitis A / Q000175:diagnosis*; D006515:Hepatitis B virus / Q000276:immunology*; D009505:Nevada; D012698:Serologic Tests