Two Year Old Children
Each year an annual immunization survey of two-year-old children born in Florida is conducted to determine if children are being immunized on schedule and to measure immunization levels based on high-risk maternal factors. The random sample survey provides estimated immunization levels for 20 participating counties and the state.
- Beginning in 2009, this indicator measures 2-year olds who have four or more doses DTaP, three or more doses polio vaccine, one or more doses MMR, three or more doses Hib (Haemophilus influenzae type B), three or more doses Hepatitis B, and one dose Varicella. Previously it measured 2-year olds with Four or more doses of diphtheria, tetanus and acellular pertussis vaccine (DTaP), three doses of poliovirus vaccine, one dose of measles, mumps and rubella vaccine (MMR).
The percentage of fully immunized two-year old children in Pinellas County in 2010 was 82.4%, a decline of 3.3 percentage points from 2009 (see Chart 1). However, the decline is considered to be not statistically significant.
- Because this is a survey, the estimated percentage for Pinellas, or any county, is likely to vary from the actual percentage due to sampling and non-sampling errors. Using a 95% confidence interval, the decline in Pinellas’ percentage between 2009 and 2010 is within the range of acceptable statistical variation and is, therefore, considered to be not significant - the decline in the state percentage is also considered to be not significant. Ninety-five percent confidence intervals for Pinellas, the state and selected counties of similar size are shown below for 2010.
Based on the 2010 survey, Pinellas compares favorably to the state and other counties of similar size (Chart 2).
For additional information on this survey, please visit the Florida Department of Health website at: http://www.doh.state.fl.us/disease_ctrl/immune/statistical/index.htm
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