UC Davis Health is vaccinating ages 5 and older

We're offering COVID-19 vaccines (first, second, and third doses) to anyone age 5 and older. Please use MyUCDavisHealth or California’s MyTurn.ca.gov to schedule your vaccine appointment.

UC Davis Health patients and non-patients can schedule appointments at our clinics in Auburn, Carmichael, Davis, Elk Grove, Folsom, Rancho Cordova, Rocklin, Roseville, and Sacramento.

COVID-19 vaccine boosters and third doses are available for all adults. You can schedule your booster or third dose with UC Davis Health. Here's what you need to know from our UC Davis Health experts:

The U.S. Food and Drug Administration (FDA) authorized a third COVID-19 vaccine dose of the mRNA vaccine from Pfizer or Moderna for immunocompromised people age 12 and older. According to recommendations from the U.S. Centers for Disease Control and Prevention (CDC) for immunocompromised patients, the third dose must be given at least four weeks after the second dose.

Some of the conditions and treatments that result in immunosuppression include, but are not limited to, the following:

  • Active treatment for solid tumor and hematologic malignancies
  • Receipt of solid-organ transplant and taking immunosuppressive therapy
  • Receipt of chimeric antigen receptor (CAR)-T-cell or hematopoietic stem cell transplant (within 2 years of transplantation or taking immunosuppression therapy)
  • Moderate or severe primary immunodeficiency (e.g., DiGeorge syndrome, Wiskott-Aldrich syndrome)
  • Advanced or untreated HIV infection
  • Active treatment with high-dose corticosteroids (i.e., ≥20 mg prednisone or equivalent per day when administered for ≥2 weeks), alkylating agents, antimetabolites, transplant-related immunosuppressive drugs, cancer chemotherapeutic agents classified as severely immunosuppressive, tumor-necrosis factor (TNF) blockers, and other biologic agents that are immunosuppressive or immunomodulatory.

Additionally, the FDA and CDC recommend a Pfizer or Moderna booster dose at least 6 months after the initial two doses for anyone 18 years and older.

Anyone who received a single dose Johnson & Johnson vaccine is eligible for a COVID-19 booster or second dose at least two months after their first dose.

People with compromised immune systems: The CDC recommends that “people with moderately to severely compromised immune systems receive an additional dose of mRNA COVID-19 vaccine at least 28 days after a second dose” of Pfizer or Moderna COVID-19 vaccine. A Johnson & Johnson booster shot should be given at least two months after the single dose.

People age 18 and older: The FDA and CDC recommend a Pfizer and Moderna booster dose at least 6 months after the initial two doses for anyone 18 years and older. Anyone who received a single dose Johnson & Johnson vaccine is eligible for a COVID-19 booster dose at least two months after their first dose.

If you are eligible for a COVID-19 vaccine booster or third dose, UC Davis Health patients and non-patients can schedule an appointment at MyUCDavisHealth. You can also use California's MyTurn.ca.gov vaccine scheduling portal.

Here are instructions to schedule your COVID-19 booster vaccination with one of our UC Davis Health locations:

  • Log into your MyUCDavisHealth account (on desktop or mobile)
  • Click "Visits" at the top
  • Click "Schedule an Appointment"
  • Scroll down and click COVID Vaccination (at the bottom on mobile or on the bottom right for desktop users)
  • Fill in the questionnaire, which will best guide you to the appropriate scheduling options.

Anyone who received a single dose Johnson & Johnson vaccine is eligible to received a booster shot or second dose, according to the CDC’s criteria. To schedule a Johnson & Johnson booster or second dose with UC Davis Health, please call 916-703-5555 Monday-Friday 8 a.m.-5 p.m.

If you want to receive a Pfizer or Moderna booster instead of a Johnson & Johnson booster or second dose, you can schedule an appointment through MyUCDavisHealth or the state of California’s centralized scheduling system MyTurn.ca.gov.

UC Davis Health employees who received two doses of the Pfizer or Moderna COVID-19 vaccine more than six months ago are eligible for a booster shot. The Employee Health Clinic is also offering flu vaccines for employees. The clinic is open Tuesday-Thursday from 7:30 a.m. to 5 p.m. and Friday from 7:30 a.m. to 10 p.m. It is closed on Mondays, weekends, and holidays. Walk-ins are welcome. Appointments are not necessary.

Please contact Employee Health at hs-employee.health@ucdavis.edu or 916-734-3572 if you have any questions about the Pfizer booster shot or the flu vaccine. 

Protection against infection decreases over time. As a result, about 6 months after the initial COVID-19 vaccine, fully vaccinated people have more risk for breakthrough infections.

For people younger than 65 years of age and who don’t have underlying conditions that increase their risk of getting the virus, COVID-19 breakthrough infections are generally mild. Most of the time, these infections don't cause severe disease or hospitalization. Therefore, this group may choose a booster vaccine to decreased risk of breakthrough infection.

People 65 and older or those with underlying conditions are at higher risk for severe infection. A COVID-19 booster dose is recommended for these groups

For immunocompromised patients, the immune response to the first two doses of mRNA vaccine may not result in enough protection, so a third COVID-19 vaccine is recommended.

Side effects following a booster or third dose of COVID-19 vaccine are similar to side effects following the second dose, with slightly more pain at the injection site, fever, chills, and fatigue. No serious side effects were found in third dose studies.

On Oct. 21, the CDC updated its recommendations to allow for the mixing of COVID-19 vaccine boosters from different manufacturers. In other words, if you received your first two doses of Pfizer, the CDC’s recommendations allow for you to get a booster dose of the Moderna vaccine – or vice-versa.

UC Davis Health plans to match previous vaccine doses with the booster shot.

Experts don’t know yet how often additional COVID-19 vaccine doses will be needed. Data is needed to see how protection varies by specific vaccine and in different populations. This is likely to evolve as the pandemic evolves and may be impacted by the development of new variants.

It was understood that COVID-19 vaccines would not protect people forever. Although some vaccine manufacturers have publicly stated that they believe boosters are needed due to declining protection, there is very little data at this time that shows decreasing protection. So far, protection appears to be durable.

According to CDC data, the Moderna vaccine is 94.1% effective at preventing laboratory-confirmed COVID-19 infection in people who received two doses and had no evidence of being previously infected.

While the vaccines' effectiveness at preventing symptoms and illness declines over time as the body processes its immune response, all of the vaccines are still highly effective against hospitalization and death. These third doses of vaccine are aimed largely at preventing illness and reducing spread during the shorter time a vaccinated person may be ill. However, the initial two-dose series is still highly effective at preventing serious infections leading to hospitalization or death.