Incidence and duration of hepatitis B surface antigenemia after neonatal hepatitis B immunization.

Bernstein, S R; Krieger, P; Puppala, B L; Costello, M · J Pediatr · 1994

prospective_cohort · Level II

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Abstract

After immunization with recombinant hepatitis B vaccine, 19 infants were tested serially for hepatitis B surface antigen (HBsAg); 65% of infants had test results positive for HBsAg at least once, the incidence peaking 2 to 3 days from the time of immunization. The longest documented duration of antigenemia was 8 days; in all patients, HBsAg test results were negative by 18 days.

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