Number of catch-up doses needed (n = 200) at admission and at 1-month follow-up by vaccine type among 95 children found to be underimmunized per ACIP guidelines. Number of catch-up doses needed (n = 200) at admission and at 1-month follow-up by vaccine type among 95 children found to be underimmunized per ACIP guidelines. DTaP, diphtheria, tetanus, and acellular pertussis vaccine for children up to age 7; Hep A, hepatitis A vaccine; Hep B, hepatitis B vaccine; Hib, Haemophilus influenzae type B vaccine; IPV, inactivated poliovirus vaccine; MCV4, meningococcal conjugate vaccine; MMR, measles, mumps, and rubella vaccine; PCV13; pneumococcal conjugate vaccine; Tdap, diphtheria, tetanus, and acellular pertussis vaccine for ages 11 and above. Barbara Pahud et al. Hospital Pediatrics 2015;5:35-41 ©2015 by American Academy of Pediatrics