Factors Associated with Underimmunization at 3 Months of Age in Four Medically Underserved Areas
This study examines coverage rates and factors associated with underimmunization at 3 months of age in four medically underserved areas. Vaccination coverage levels at 3 months of age varied across sites: They were 82.4% in northern Manhattan, 70.5% in Detroit, 82.3% in San Diego, and 75.8% in rural Colorado. Among children who were not up to date, the majority (65.7% to 71.5%, per site) had not received vaccines because of missed opportunities.