Lk. Washburn et al., RESPONSE TO HAEMOPHILUS-INFLUENZAE TYPE-B CONJUGATE VACCINE IN CHRONICALLY ILL PREMATURE-INFANTS, The Journal of pediatrics, 123(5), 1993, pp. 791-794
Twenty-two premature infants with chronic lung disease (median gestati
onal age 28 weeks) received polyribosylribitol phosphate-outer membran
e protein conjugate Haemophilus vaccine at 2 and 4 months of chronolog
ic age. The proportions with antibodies to polyribosylribitol phosphat
e of levels >1 mug/ml after doses 1 and 2 were 27% and 55%; geometric
mean titers were 0.43 and 0.73 mug/ml, significantly lower than values
for term infants.