Ratio: Percent of children receiving four (4) or more doses diphtheria-tetanus-acellular pertussis (DTaP) vaccine by 19-35 months of age.

Definition: Percentage of young children who received effective vaccination coverage levels for universally recommended vaccines by a given age; diphtheria-tetanus-acellular pertussis (DTaP) vaccine by 19-35 months of age.

Data Source: National Immunization Survey, National Center for Health Statistics, U.S. Centers for Disease Control and Prevention

Ratio: Percentage of children aged 19 to 35 months who have received the 4:3:1:3:3:1:4 vaccination series.

Definition: 4:3:1:4:3:1:4 series combination = 4 doses DTP or DTaP, 3 doses Polio, 1 dose MMR, 4 doses Hib, 3 doses Hepatitis B, 1 dose Varicella, and 4 doses PCV7 vaccine.

Data Source: National Immunization Survey, National Center for Health Statistics, U.S. Centers for Disease Control and Prevention

Ratio: Percentage of children aged 19 to 35 months who have received the 4:3:1:3:3:1:4 vaccination series.

Definition: 4:3:1:4:3:1:4 series combination = 4 doses DTP or DTaP, 3 doses Polio, 1 dose MMR, 4 doses Hib, 3 doses Hepatitis B, 1 dose Varicella, and 4 doses PCV7 vaccine.

Data Source: National Immunization Survey, National Center for Health Statistics, U.S. Centers for Disease Control and Prevention

Ratio: Percent of children receiving four (4) or more doses diphtheria-tetanus-acellular pertussis (DTaP) vaccine by 19-35 months of age.

Definition: Percentage of young children who received effective vaccination coverage levels for universally recommended vaccines by a given age; diphtheria-tetanus-acellular pertussis (DTaP) vaccine by 19-35 months of age.

Data Source: National Immunization Survey, National Center for Health Statistics, U.S. Centers for Disease Control and Prevention