in hepatitis b , the development of serological markers , molecular probes ( hbv-dna ) , natural animal hepatitis with near-identical viruses , and delta antigen ( a virus requiring co-infection with hepatitis b ) have all extended our knowledge so dramatically that it is hoped that the enigma of chronic hepatitis will be solved when an assay for nanb hepatitis becomes available .
C0019188
animal
C0019158
hepatitis