Js. Abramson et al., DEVELOPMENT OF A VACCINE TRACKING SYSTEM TO IMPROVE THE RATE OF AGE-APPROPRIATE PRIMARY IMMUNIZATION IN CHILDREN OF LOWER SOCIOECONOMIC-STATUS, The Journal of pediatrics, 126(4), 1995, pp. 583-586
We conducted a randomized, controlled trial to determine the effective
ness of an immunization tracking system designed to increase the numbe
r of infants of lower socioeconomic status who receive their primary s
eries of vaccinations at age-appropriate times, By 7 months of age, 91
% (274/301) of the infants in the intervention group were up-to-date o
n their primary series of vaccinations versus 72% (214/296) of the inf
ants in the control group (p <0.0001). The estimated cost of follow-up
for each infant in the intervention group was $18.05.