United States National Immunization Survey-Child 2014-2015

The National Immunization Survey is conducted by the National Center for Immunizations and Respiratory Diseases and the National Center for Health Statistics at the Centers for Disease Control and Prevention. It began in April 1994 in order to collect data on childhood immunization coverage. It uses a list-assisted random-digit-dialing telephone survey methodology of household respondents, and a mailed survey to children’s health care providers. The target population for the survey is children ages 19-35 months at the time of the interview, and the mail-in portion of the survey collects data on all current recommended vaccines and doses. In 2014, Puerto Rico was incorporated into the sample of aproximately 14.9 million telephone numbers, both landline and cell, that garnered interviews for 24,879 children, and adequate provider data for 15,059 of those children.