Table 4.

Early Season Influenza Vaccination Rates by Subgroup Across Years: 2014–2016 National Internet Flu Survey

Subgroup	NIFS 95% confidence interval by year
	2014	2015	2016
Overall	40.4 ± 1.8	39.9 ± 1.9	40.6 ± 1.7
Age (in years)
18–9	31.4 ± 2.7	31.8 ± 2.8	34.3 ± 2.7
50–64	43.9 ± 3.2	41.3 ± 3.4	41.7 ± 2.9
≥65	61.7 ± 3.7	60.4 ± 3.9	56.6 ± 2.7
Race/ethnicitya
Hispanic	36.5 ± 5.2	36.8 ± 5.9	43.5 ± 4.5
NH white	41.3 ± 2.3	41.6 ± 2.3	39.7 ± 2.2
NH black	39.2 ± 4.6	35.5 ± 5.3	40.6 ± 4.4
NH other/multiple races	42.7 ± 6.2	37.9 ± 6.5	43.1 ± 5.5
High-risk medical condition (18–64 years only)b
Yes	43.2 ± 4.1	40.8 ± 4.3	43.5 ± 3.8
No	32.6 ± 2.4	32.7 ± 2.6	34.0 ± 2.4

^aThe non-Hispanic (NH) other category includes adults who reported their ethnicity as non-Hispanic and their race as American Indian/Alaska Native, Asian, Native Hawaiian, other Pacific Islander, or reported multiple races.

^bHigh-risk medical conditions include chronic asthma, a lung condition other than asthma, heart disease (other than high blood pressure, heart murmur, or mitral valve prolapse), diabetes, a kidney condition, a liver condition, sickle cell anemia or other anemia, a neurologic or neuromuscular condition, a weakened immune system caused by a chronic illness or by medicines taken for a chronic illness, or obesity. Status was determined from NIFS responses.