Respiratory Virus Vaccine Data 2024
Prepared by the Solano County Epidemiology Unit
May 21, 2025
Vaccinations by Dose
In 2024, a total of 88,358 COVID-19 vaccine doses were administered to Solano County residents.
A total of 139,722 influenza vaccine doses were administered to Solano County residents.
A total of 12,438 RSV vaccine doses were administered to Solano County residents.
Below are the dose counts for COVID, Influenza, and RSV vaccinations for years 2020 - 2024. RSV vaccine counts dramatically increased from 2022 to 2023. Although the overall counts of COVID vaccinations decreased substantially from 2021 to 2022 and 2023, this likely reflects a shift from the multi-dose initial vaccine series to the single-dose seasonal vaccine.
Vaccine | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|
COVID-19 | 8,891 | 706,049 | 246,650 | 87,910 | 88,358 |
Influenza | 167,168 | 150,861 | 155,272 | 141,109 | 139,722 |
RSV | 42 | 33 | 28 | 11,296 | 12,438 |
COVID-19 Vaccinations by Recipient
A total of 55,412 Solano County residents received at least one dose of a COVID-19 vaccine in calendar year 2024.
Most residents received their vaccine in fall or early winter.
Older adults were the age group that vaccinated the most in 2024. Although adults aged 65+ account for about 18% of the general county population, they comprised about 35% of the population that received a COVID vaccine last year.
Solano County residents identifying as Native Hawaiian or Pacific Islander had the highest vaccination rates for COVID-19 in 2024. Residents identifying as multiracial had the lowest rates.
Benicia had the highest COVID vaccination rates in the county in 2024, while Vacaville had the lowest rates.
Influenza Vaccinations by Recipient
A total of 131,807 Solano County residents received an influenza vaccine in calendar year 2024.
Most residents received their influenza vaccine in early to late fall.
As with COVID vaccinations, individuals age 65 or older were the group with the highest vaccination counts last year.
Influenza vaccination rates are higher than COVID vaccination rates for all race/ethnic groups. The relative vaccination rates between the groups are distributed similarly to those of COVID.
In 2024, Rio Vista had the highest influenza vaccination rate of any city in Solano County. Influenza vaccination rates are generally much higher than COVID vaccination rates county-wide.
RSV Vaccinations by Recipient
A total of 12,264 Solano County residents received an RSV vaccine in calendar year 2024.
Most residents received their vaccine in fall or winter.
As with COVID and flu vaccinations, individuals age 65 or older were the group with the highest vaccination counts last year. Residents under 5 years of age comprised a greater proportion of RSV vaccine recipients than for COVID or flu.
Native Hawaiian or Pacific Islanders had the highest vaccination rates against all three diseases in 2024. Individuals identifying as white had relatively higher vaccination rates for RSV than they did for COVID and influenza, although the vaccination rates for RSV are lowest across all race/ethnic groups.
Vacaville had the lowest vaccination rates against all three diseases in 2024, although the RSV vaccination rates in Dixon, Vallejo, Fairfield, and Suisun City were comparable to those of Vacaville.
Notes
- Vaccination data were derived from the California Department of
Public Health’s Snowflake data repository. The Snowflake data repository
(henceforth referred to as “Snowflake”) contains vaccination data as
reported to the California Immunization Registry.
- Snowflake data for 2024 were downloaded on January 29, 2025. Snowflake data for years 2020 - 2023 were downloaded on February 10, 2025. Data downloaded on different days may yield different results.
- Denominator data for rates were taken from the California Department of Finance’s E-1 and P-3 data files (2024 population estimates).
- For dose counts, the Snowflake table “All Vaccine Doses (TBL_VAX_DOSES_ALL_LHJ)” was queried for vaccine group display names that contain “COVID”, “Influenza”, and “RSV.” Therefore the results contain records for different vaccines within the broad categories (e.g. Influenza seasonal AND influenza H1N1; RSV AND Ig-RSV; COVID-Seasonal AND COVID-19).
- For recipient counts, the following Snowflake data tables were
queried:
- COVID-19 Vaccine Recipients: VW_ALL_IIS_RECIPIENTS_LHJ
- Influenza Vaccine Recipients: TBL_INFLUENZA_RECIPIENT
- RSV Vaccine Recipients: VW_RSV_RECIP_LHJ
- After initial download from Snowflake, the residence city of all recipients was reviewed; individuals reported to live in cities outside of Solano County were removed from the datasets. Individuals reported as homeless, with unknown residence city, or with ambiguous city names were retained.