Table 1. Percentage point difference in vaccination coverage by age 19 months between adjacent survey years, among children with dates of birth included in 

both survey years, National Immunization Survey-Child, 2011–2017, United States

NIS-Child Years Compared 

Month and Year of Birth

2011 vs. 2012

Jan 2009–May 2010

2012 vs. 2013

Jan 2010–May 2011

2013 vs. 2014

Jan 2011– May 2012

2014 vs. 2015

Jan 2012– May 2013

2015 vs. 2016

Jan 2013– May 2014

2016 vs. 2017

Jan 2014– May 2015

Vaccine/Dose % (95% CI) % (95% CI) % (95% CI) % (95% CI) % (95% CI) % (95% CI) 

DTaP*

 ≥3 doses -0.95 (±1.47) -1.18 (±1.95) -0.25 (±1.92) -0.23 (±1.54) -2.12 (±1.45) 0.33 (±1.96)

 ≥4 doses -2.28 (±2.53) -0.38 (±2.99) 2.25 (±3.02) -2.57 (±2.89) -4.49 (±2.73) -0.52 (±3.04)

Poliovirus (≥3 doses) -1.12 (±1.68) -0.48 (±2.04) 0.03 (±2.02) 0.04 (±1.71) -3.23 (±1.94) -0.17 (±2.38)

MMR (≥1 dose) -1.67 (±1.93) 0.66 (±2.19) -0.93 (±2.08) -0.34 (±2.29) -1.15 (±1.91) 1.98 (±2.15)

Hib†

 Primary series -1.91 (±1.61) -0.05 (±1.80) -1.56 (±1.98) 0.28 (±1.64) -2.19 (±1.47) -0.02 (±1.97)

 Full series -2.12 (±2.42) 0.61 (±2.96) -0.10 (±2.96) -1.53 (±2.78) -2.60 (±2.56) -0.49 (±3.03)

HepB 

 ≥3 doses -2.45 (±1.88) 0.35 (±2.10) -0.42 (±2.18) -0.36 (±1.94) -3.39 (±1.96) 1.55 (±2.01)

 Birth dose§ -0.87 (±2.54) 2.38 (±2.76) -2.18 (±3.09) 0.59 (±2.93) -0.70 (±2.94) 2.19 (±3.14)

Varicella (≥1 dose) -1.14 (±1.91) 1.28 (±2.24) -1.96 (±2.08) 0.17 (±2.37) -1.99 (±1.99) -0.05 (±2.38)

PCV 

 ≥3 doses -1.75 (±1.66) -1.01 (±2.03) -1.62 (±2.06) -0.20 (±2.00) -2.81 (±1.66) -0.54 (±2.32)

 ≥4 doses -2.84 (±2.38) 0.23 (±2.99) -0.67 (±2.77) -0.80 (±2.83) -4.74 (±2.40) 0.54 (±2.85)

HepA 

 ≥1 dose -0.83 (±2.46) -0.17 (±2.78) 0.32 (±2.70) 0.30 (±2.85) -2.11 (±2.34) -1.05 (±2.64)

 ≥2 doses 0.90 (±2.16) 0.18 (±2.54) 1.10 (±2.55) 1.23 (±2.35) -0.46 (±2.48) 1.35 (±2.85)

Rotavirus¶ -2.94 (±2.56) 1.61 (±2.92) -2.56 (±3.12) -0.90 (±2.98) -0.80 (±2.66) -1.87 (±2.93)

Combined 7-vaccine

series**

-3.75 (±2.73) -1.69 (±3.17) 2.15 (±3.17) -0.71 (±3.14) -3.89 (±2.91) -1.10 (±3.21) 

Abbreviations: CI = confidence interval; DTaP = diphtheria, tetanus toxoids, and acellular pertussis vaccine; HepA = hepatitis A vaccine; HepB = hepatitis B vaccine; Hib = Haemophilus 

influenzae type b conjugate vaccine; MMR = measles, mumps, and rubella vaccine; PCV = pneumococcal conjugate vaccine.

Bolded estimates of difference are statistically significant at p<0.05, when the absolute value of estimate is larger than the half-width of the 95% CI.

* Includes children who might have been vaccinated with diphtheria and tetanus toxoids vaccine or diphtheria, tetanus toxoids, and pertussis vaccine.

† Hib Primary series: receipt of ≥2 or ≥3 doses, depending on product type received. Full series: receipt of ≥3 or ≥4 doses, depending on product type received (primary series and 

booster dose). § One dose HepB administered between birth and age 3 days.

¶ Rotavirus vaccine includes ≥2 or ≥3 doses, depending on the product type received (≥2 doses for Rotarix [RV1] and ≥3 doses for RotaTeq [RV5]).

** The combined 7-vaccine series (4:3:1:3*:3:1:4) includes ≥4 doses of DTaP, ≥3 doses of poliovirus vaccine, ≥1 dose of measles-containing vaccine, the full series of Hib (≥3 or

≥4 doses, depending on product type of vaccine), ≥3 doses of HepB, ≥1 dose of varicella vaccine, and ≥4 doses of PCV.