Trends in place of early-season influenza vaccination among adults, 2014-15 through 2018-19 influenza seasons-The importance of medical and nonmedical settings for vaccination

BACKGROUND

Annual vaccination is the most effective strategy for preventing influenza. We assessed trends and demographic and access-to-care characteristics associated with place of vaccination in recent years.

METHODS

Data from the 2014-2018 National Internet Flu Survey were analyzed to assess trends in place of early-season influenza vaccination during the 2014-15 through 2018-19 seasons. Multivariable logistic regression was conducted to identify factors independently associated with vaccination settings in the 2018-19 season.

RESULTS

Among vaccinated adults, the proportion vaccinated in medical (range: 49%-53%) versus nonmedical settings (range: 47%-51%) during the 2014-15 through 2018-19 seasons were similar. Among adults aged ≥18 years vaccinated early in the 2018-19 influenza season, a doctor's office was the most common place (34.4%), followed by pharmacies or stores (32.3%), and workplaces (15.0%). Characteristics significantly associated with an increased likelihood of receipt of vaccination in nonmedical settings among adults included household income ≥$50,000, having no doctor visits since July 1, 2018, or having a doctor visit but not receiving an influenza vaccination recommendation from the medical professional.

CONCLUSIONS

Place of early-season influenza vaccination among adults who reported receiving influenza vaccination was stable over 5 recent seasons. Both medical and nonmedical settings were important places for influenza vaccination. Increasing access to vaccination services in medical and nonmedical settings should be considered as an important strategy for improving vaccination coverage.

National and state-specific estimates of place of influenza vaccination among adult populations - United States, 2011-12 influenza season

BACKGROUND

Annual influenza vaccination has been recommended for all persons ≥6 months since the 2010-11 season. New partnerships between public health agencies and medical and nonmedical vaccination providers have increased the number of vaccination providers and locations where vaccination services are delivered.

METHODS

Data from the 2011-12 Behavioral Risk Factor Surveillance System (BRFSS) were analyzed. Point estimates of place of vaccination and 95% confidence intervals were calculated. Multivariable logistic regression and predictive marginal modeling were conducted to identify factors associated with vaccination settings.

RESULTS

Among adults vaccinated during the 2011-12 influenza season, a doctor's office was the most common place (38.4%) for receipt of influenza vaccination, with stores (e.g., supermarkets or drug stores) (20.1%) the next common, and workplaces (17.6%) the third common. Overall, reported vaccination in nonmedical settings by state ranged from 32.2% in California to 60.4% in Nevada, with a median of 45.8%. Characteristics significantly associated with an increased likelihood of receipt of vaccination in nonmedical settings were higher education, not having certain identified high-risk conditions, not having had a routine checkup in the previous 12 months, and not having a primary doctor for health care. Being a member of a racial/ethnic minority group, unemployed or not in the work force were significantly associated with a decreased likelihood of receipt of vaccination in nonmedical settings.

CONCLUSION

Doctor's offices were the most common medical setting for adult influenza vaccination; workplaces and stores were important nonmedical settings. Increasing access to vaccination services in medical and nonmedical settings should be considered as important strategies for improving vaccination coverage. These results also can help guide development of strategies for achieving Healthy People 2020 objectives for influenza vaccination of adult populations.