Data and Statistics

Page last updated 11/2/2026.

The Epidemiology and Immunization Services Branch (EISB), in the Public Health Services Department of the County of San Diego Health and Human Services Agency, uses various data sources and methodologies to calculate community vaccination coverage rates. Information collected helps us plan programs to better protect all San Diegans and visitors from vaccine preventable diseases. 

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On this page:

County Vaccination Coverage

Comparisons with State and National Estimates:
Progress is measured against Healthy People 2030, the U.S. Department of Health and Human Services’ 10-year national health objectives, which are reviewed regularly. Immunization goals include:

  • Eliminating vaccine-preventable diseases such as congenital rubella syndrome.
  • Reducing HPV infections in young adults.
  • Reducing measles, mumps, pertussis, and RSV cases among infants.
  • Protecting everyone against seasonal influenza.

Vaccine Coverage Statistics: A Work in Progress
The most recent San Diego RDD was conducted in 2024-2025. Coverage rate estimates below include results from RDD surveys and CAIR2.

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Infants

CAIR2 & RDD Estimates

  • Fifty six percent (56%) of San Diego children aged 19-35 months completed the 4:3:1:3:3:1:4 series:
    • Four (4) doses of DTaP (diphtheria, tetanus, and pertussis), three (3) doses of polio, one (1) dose of MMR (mumps, measles, and rubella), three (3) doses of Hib (Haemophilus influenzae B), three (3) doses of hepatitis B, one (1) dose of varicella (chickenpox) and four 4 doses of pneumococcal (PCV).
    • o This rate was lower than the most recent state and national estimates.
  • The local MMR (1+ dose) vaccination rate of 87% fell short of the Healthy People 2030 goal of 91% of children by 2 years of age.
  • The local DTaP (4+ doses) vaccination rate of 74% fell short of the Healthy People 2030 goal of 90% by 2 years of age.
  • The most recent estimates were lower overall than previous estimates, however, several rates, including the DTaP and Hepatitis B series, showed only a very small decrease (<1%).

Healthy People 2030 Objectives

  • Maintain the vaccination coverage level of 1 dose of the MMR vaccine in children by age 2 years (target of 90.8%).
  •  Reduce the proportion of children who receive 0 doses of recommended vaccines by age 2 years (target is 1.3%).
  • Increase the coverage level of 4 doses of the DTaP vaccine in children by age 2 years (target is 90%).

The graphs below show the changes in coverage rates for each vaccine over the last several years, as well as how San Diego compares to state and national results.  

  • There was an overall decline in vaccination rates from 2022 to 2025.  

  • It is important to note that the 2021/22 RDD results are not directly comparable to 2024/25 CAIR-based estimates due to a change in methodology used to estimate immunization coverage. EISB anticipates continuing to utilize CAIR records for ongoing year estimates. 

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  • Notes

    Abbreviations: DTaP = diphtheria, tetanus toxoids, and acellular pertussis vaccine; MMR = measles, mumps, and rubella vaccine; Hib = Haemophilus influenzae type b vaccine; PCV = pneumococcal conjugate vaccine. 

    *San Diego data from San Diego County Random Digit Dialing Survey through 2022; 2025 data are estimated using California Immunization Registry data. 

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  • Notes

    Abbreviations: DTaP = diphtheria, tetanus toxoids, and acellular pertussis vaccine; MMR = measles, mumps, and rubella vaccine; Hib = Haemophilus influenzae type b vaccine; PCV = pneumococcal conjugate vaccine; US = United States; CA = California; NIS = National Immunization Survey.

    *US and CA data from NIS. San Diego data from San Diego County Random Digit Dialing Survey through 2022; 2025 data are estimated using California Immunization Registry data.

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Adolescents

CAIR2 & RDD Estimates 

  • There were lower rates of all vaccinations among San Diego adolescents in 2025 compared to RDD 2021/22, except Tdap which increased 0.7%. Rates were also lower than state and national estimates.  

  • The percentage of San Diego County adolescents who received all recommended doses of HPV vaccine fell short of the Healthy People 2030 goal of 80% at 57%. 

Healthy People 2030 Objectives 

  • Increase the proportion of adolescents who get recommended doses of the HPV vaccine (target is 80%). 

  • Increase the proportion of people who get the flu vaccine every year (target is 70%). 

  • The graph below shows local coverage rates for 13–17-year-olds. Like the preceding results, the most recent vaccine coverage estimates were compared to previous measurements to determine if progress has been made over the years. It is important to note that the 2021/22 RDD results are not directly comparable to 2024/25 CAIR-based estimates due to a change in methodology used to estimate immunization coverage. EISB anticipates continuing to utilize CAIR records for ongoing year estimates. 

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  • Notes

    Abbreviations: Tdap = tetanus toxoids, diphtheria, and acellular pertussis vaccine; MCV = meningococcal vaccine; HPV = human papillomavirus vaccine; US = United States; CA = California; NIS = National Immunization Survey.

    *US and CA data from NIS. San Diego data from San Diego County Random Digit Dialing Survey through 2022; 2025 data are estimated using California Immunization Registry data.

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Adults

RDD Results  

  • Pneumococcal coverage increased in 2024/25 for both high-risk adults 18-59 (+7%) and all adults aged 60 and older (+1%) compared with 2021/22 coverage rates.  

  • Coverage rates for herpes zoster increased 15% in 2024/25 for adults 60 and older.  

  • HPV vaccination rates among adults younger than 46 increased by 2% for those reporting receipt of at least one dose, and 9% for those receiving all recommended doses compared with 2021/22.  

  • The COVID-19 coverage rate for all adults 18 and older decreased slightly in 2024/25, with a 1% decrease among 18–59-year-olds and a 3% decrease among those aged 60 and older.  

  • Tdap coverage decreased 9% in 2024/25 for all adults 18 and older.

     

Healthy People 2030 Objectives 

  • While the overall 2024/25 adult flu vaccination coverage rate in San Diego (61%) was below the Healthy People 2030 goal of 70%, coverage reported among San Diego adults 60 and older exceeded the goal (76%). 

The graph below contains coverage rates for recommended vaccines for adults. Vaccine coverage rates in the latest survey were compared to previous measurements to illustrate changes from 2021/22 to 2024/25. 

The graph below contains rates for influenza vaccinations for adults 18 and older. San Diego County adults had higher flu vaccination coverage rates than both California and national rates in 2024/25.  

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  • Notes

    Abbreviations: SD RDD=San Diego County Random Digit Dialing Survey; US=United States; CA=California 

    *High Risk =High risk reported one or more of the following health conditions/risks: heart problems (not including blood pressure problems), lung disease, liver disease, immune system disorder, cancer, diabetes, kidney disease, sickle cell/thalassemia, spleen removal/functional asplenia, cigarette smoker 

    **Age groups: High-risk: 18-64 in 2021, 18-59 in 2024 survey; Senior: 65+ in 2021, 60+ in 2024 survey. 

    Survey year reflects the influenza season of the corresponding year (e.g., 2021 survey refers to the 2020-2021 influenza season). 

    §U.S. and California data from National Health Interview Survey, years 2021-22 and 2024-25 estimates. 

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Pregnancy and Mothers of Infants

RDD Results 

  • Among pregnant persons and mothers of children <17 months of age who had received a Tdap vaccine, 34% received Tdap during pregnancy in 2024/25, which is a decrease of 20% from 2021/22. 

  • Households in 2024/25 in which all individuals had been vaccinated for Tdap decreased 8% from 2021/22. 

  • RSV immunization was surveyed for the first time in 2024/25. Sixty three percent of pregnant respondents received RSV vaccine, and a combined 73% of mothers of children <17 months and their babies were immunized against RSV. 

Healthy People 2030 Objectives 

  • Influenza vaccination coverage among pregnant persons and mothers of children <17 months in San Diego increased to 81% in 2024/25, which is higher than the Healthy People 2030 goal (70%). 

  • Increase the proportion of women who get the Tdap vaccine during pregnancy (this target is in development).  

The County of San Diego Health and Human Services Agency’s Immunization Program continues to work with its community partners, both organizations and individuals, to improve immunization rates in the County. Staff and partners are always looking for new and innovative ways to increase the effectiveness of immunization promotion and education efforts. Those efforts never cease; every year there is always a new population of babies who need immunizations to protect them from serious, vaccine-preventable diseases.  

 

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Resources

Random Digit Dialing (RDD) Telephone Surveys

Interviewers call randomly selected phone numbers to learn about vaccination coverage, knowledge, and attitudes among San Diego County residents. Results show how many infants, adolescents, adults, pregnant women, mothers of young children, and seniors are fully immunized, helping us plan programs that protect San Diegans and visitors. Responses were checked against CAIR2 or the regional registry in use at the time (SDIR). In past years, staff have also verified with providers, with parent or guardian permission. 

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Immunization Information System (IIS) Based Estimates

San Diego uses CAIR2, California’s secure, confidential, statewide immunization registry. Estimates use the numerator and denominator for each vaccine reviewed. Since AB 1797 took effect on January 1, 2023, all vaccines given in California must be reported to CAIR2, making estimates more representative. 

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References

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Contact the San Diego Immunization Unit via e-mail or call at (866) 358-2966 for more information or to request materials.