The Efficacy in Navajo Infants of a Conjugate Vaccine Consisting of<i>Haemophilus influenzae</i>Type b Polysaccharide and<i>Neisseria meningitidis</i>Outer-Membrane Protein Complex

The H. influenzae type b OMPC vaccine, administered at 2 and 4 months of age, is safe and induces a high rate of protection against invasive disease caused by H. influenzae type b in infants under the age of 18 months. Protection begins after the first dose.