Acute hepatitus is defined as the aggravate of: acute hepatitis A as an infection with the hepatitis A virus resulting in anti-HAV IgG seroconversion, acute hepatitis B as the period corresponding to initial infection with the hepatitis B virus, acute hepatitis C as the period corresponding to initial infection with the hepatitis C virus, resulting in anti-HCV IgG seroconversion, acute hepatitis E as an infection with the hepatitis E virus resulting in anti-HEV IgG seroconversion, all regardless of symptoms.
Source: Global Health Data Exchange