Factors Associated with Annual Influenza Vaccination Uptake in U.S. Older Adults from 2019 to 2020

Abstract

Annual influenza vaccination is important for older adults to prevent morbidity and mortality from seasonal influenza. Although the United States has had limited success in increasing influenza vaccination, the rise of the COVID-19 pandemic in 2020 may have changed older adults’ approach to vaccination. The objective of this study is to determine factors associated with influenza vaccination in 2019 and 2020 and compare their degree of associations across the two years. Data from the 2019 and 2020 National Health Interview Survey, a nationally representative cross-sectional interview, were collected for variables relating to annual influenza vaccination and possible associated factors. Data were analyzed using chi-square tests and multiple logistic regression. The results show that never having received a vaccination for pneumonia increased the odds of receiving an influenza vaccination by 6.79–7.80 times. Recent specialist care for eye or oral health significantly increased the odds of receiving an influenza vaccination. Being a smoker, identifying as African American, and considering oneself to have excellent overall health were associated with significantly lower odds of receiving a vaccination. Although self-reported feelings of anxiety were not associated with vaccination in 2019, they increased the odds in 2020. Overall, influenza vaccination in older adults may be tied to reliable healthcare access and perceived susceptibility to infectious respiratory diseases.