in 499 families with a type b viral hepatitis patient , type b viral hepatitis morbidity among 1116 contacts amounted to 2.24 % within 6 months of the primary patients ' hospitalization ( being 188.2 times higher than semiannual morbidity of the population of the czech socialist republic , csr ) and the prevalence of hbsag amounted to 8.96 % ( being 22.4 times higher than among the population of csr ) .
C0019163
type b viral hepatitis
C0019168
hbsag