to determine whether anaesthetists are at risk from developing hepatitis-b virus ( hbv ) infection from their patients , 95 anaesthetists working with black south africans ( who have a high prevalence of hepatitis-b antigenaemia ) were questioned about attacks of viral hepatitis and their blood was tested for hepatitis-b ( surface ) antigen ( hbsag ) and antibody ( anti-hbs ) .
C0019163
a
C0019168
hbsag