Notes: Data are based on household interviews of a sample of the civilian noninstitutionalized population. Respondents were asked in separate questions if they had received a flu shot during the past 12 months or a flu vaccine sprayed in their nose during the past 12 months. For children 6 months–8 years, who require two doses of vaccine to be fully vaccinated if they have not previously received seasonal influenza vaccination, these questions do not indicate whether the vaccination was a child’s first or second dose. In August 2010, National Health Interview Survey influenza vaccination questions were modified to reflect that, for the first time, the widely available influenza vaccine included protection against both seasonal and H1N1 types of influenza. When interpreting influenza vaccination estimates, changes made to the influenza vaccination questions noted above should be taken into account. Prevalence of influenza vaccination during the past 12 months is different from season-specific coverage (see
http://www.cdc.gov/mmwr/preview/mmwrhtml/ss6204a1.htm?s_cid=ss6204a1_w; estimates available from: http://www.cdc.gov/flu/fluvaxview). Advisory Committee on Immunization Practices recommendations regarding who should receive an influenza vaccination have changed over the years, and changes in coverage estimates may reflect changes in recommendations. The analyses excluded the 2.0% of persons with unknown influenza vaccination status. See Technical Notes for more details.
Data Source: CDC/NCHS, National Health Interview Survey, January–June 2015, combined Sample Adult and Sample Child Core components.
Source: Centers for Disease Control and Prevention/National Center for Health Statistics: Early Release of Selected Estimates Based on Data From the January–June 2015 National Health Interview Survey