Immunogenicity of four Haemophilus influenzae type b conjugate vaccines in to 19-month-old children

From the Edward Mallinckrodt Department of Pediatrics and Division of Infectious Diseases, Washington University School of Medicine, St, Louis, Missouri; the Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas; the Park Nicollet Medical Center, Minneapolis, Minnesota; the Department of Pediatrics, Baylor College of Medicine, Houston, Texas; and Pennridge Pediatric Associates, Sellersville, Pennsylvania, and Temple University School of Medicine and St. Christopher's Hospital for Children, Philadelphia, Pennsylvania