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Information About Immunizations (Vaccines)

Vaccines provide protection against dangerous infectious diseases and save lives. Vaccines prevent diseases such as measles, whooping cough, polio, hepatitis B, and chickenpox. Many of these serious infectious diseases are at (or near) record low levels in the United States because of vaccines. Unfortunately, recent outbreaks of pertussis and measles in the U.S. demonstrate the dangers of people not having the recommended vaccinations. By vaccinating on time, you can protect your family and also protect others in your community. Consult your doctor if you have any questions.

The recommended schedule of vaccines depends upon individual factors such as age group, health status, pregnancy, and foreign travel.  Information, recommendations, and resources for these and other important categories are available below.

 Infants & Children

Infants & Children (Ages 0-6 years


Adolescents (Preteens and Teens)

College Students & Young Adults

College Students & Young Adults (Ages 19-24 years)

Pregnant Women

Pregnant Women


Adults (Ages 19-64 years)


Seniors (Ages 65 years and older)

Travel Immunizations

Travel Immunizations

Seasonal Influenza Information

Seasonal Influenza (Flu) Information

Providers: Schools and Child Care Centers

Information for Schools and Child Care Centers


Information for Health Care Providers


Public Health Immunization Clinics

If your infant or child does not have health insurance or you cannot afford immunizations, the County of Orange Health Care Agency provides free immunizations for infants and children ages 2 months to 18 years at our clinic in Santa Ana.


Community Clinics: free and low-cost

Information about where to find free and low-cost medical services and immunizations at other clinics in Orange County.


About the OCHCA Immunization Assistance Program

Young-Boy Muscle-Vaccine


Click Here for COVID-19 Vaccine Information

Free Flu Shot


Click Here for Influenza (Flu) Vaccine Information


How Well-Vaccinated Is Your Child's Kindergarten?