Sociodemographic disparities in COVID-19 and RSV vaccine uptake among California adults ≥60 years old who received influenza vaccination.

INTRODUCTION: In 2023, adults ≥60 years old were eligible to receive updated influenza and COVID-19 vaccines along with newly available respiratory syncytial virus (RSV) vaccines. Vaccine acceptance for influenza is typically high among this age cohort. We assessed COVID-19 and RSV vaccine uptake among influenza vaccine recipients to identify sociodemographic disparities among California adults ≥60 years old who did not receive all three vaccinations.

METHODS: We used a cross-sectional design to assess the prevalence of COVID-19 and RSV vaccination among California adults ≥60 years old with an influenza vaccination reported to the California Immunization Registry during 08/01/2023-06/30/2024. We used log binomial regression to calculate prevalence ratios (PR) and 95 % confidence intervals (95 %CI) that measured associations between recipient sociodemographic characteristics and receipt of all three vaccines.

RESULTS: Among 4,471,042 adults included in this study, 901,815 (20 %) received all three vaccinations during 2023-2024. The prevalence for receiving COVID-19 and RSV vaccines among Latino adults residing in the lowest resource communities was 80 % less (PR: 0.20, 95 %CI: 0.19, 0.20) than among white adults residing in the highest resource communities when the vaccination status of the comparison group was limited to influenza only vaccine recipients.

CONCLUSIONS: We identified concerning disparities in the uptake of COVID-19 and RSV vaccines among older adults during the 2023-2024 respiratory virus season in California. Provider awareness of these disparities may help improve vaccine uptake among older adult populations when patients seek their seasonal influenza vaccinations.