==hep B==
*family ''Hepadonavirus''*transmission route**vertical**horizontal***sexually transmitted***sharing needles===epidemiology===**240 mil. hep B carriers worldwide**0.5 mil. death per year*highly infectious; 10 virus copies are enough to infection===genotypes===*genotypes B and C prevalent in Asia*A in Europe===acute hep B===*genotype A is increasing in Japan**10% of genotype A carrier develope chronic carrier*6.3% of hep B carrier are co-infected by hep C===treatment===