| low risk of mother to infant transmission of hepatitis b virus in guipúzcoa (basque country, northern spain). | the prevalence of hbsag carriers in 18,196 pregnant women (64% of women who gave birth in guipúzcoa in 1986-1991) was 0.61% (0.43% for the last two years of the study). three of the carriers were also hbeag/hbv-dna positive and two were anti-hdv positive. anti-hbc prevalence was 6.5% in 602 20-40 year old women and 1.6% in 428 girls 10-11 years old (0.47% of gypsy ethnic subjects are not included). | 1992 | 1294397 |