Microbiology Virology ac3953d6 Serological marker of infectivity of Hepatitis 'B' is - A HBsAg B HBeAg C IgM anti Hbc D HBcAg High-Yield Explanation HBeAg presence indicates high infectivity&indicator of active viral application REF:<\p> ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.547