| positive test results for acute hepatitis a virus infection among persons with no recent history of acute hepatitis--united states, 2002-2004. | hepatitis a is a nationally reportable condition, and the surveillance case definition includes both clinical criteria and serologic confirmation. state health departments and cdc have investigated persons with positive serologic tests for acute hepatitis a virus (hav) infection (i.e., igm anti-hav) whose illness was not consistent with the clinical criteria of the hepatitis a case definition. test results indicating acute hav infection among persons who do not have clinical or epidemiologic fea ... | 2005 | 15889006 |