Can you mix vaccines?


This question was answered live at the virtual conference titled, "Don’t Hesitate to Vaccinate! Our Experts Tell You Why" recorded on January 28, 2021.

Short Answer:

You should NOT mix vaccines.


The COVID vaccine comes in two doses, and there are two different brands currently administering them: Pfizer and Moderna. You should get Pfizer and Pfizer OR Moderna and Moderna for the first and second doses.

The CDC made some recommendations: if there were some *really extreme circumstances* in which you received the Pfizer COVID vaccine for the first dose and then for some reason you could not get Pfizer anywhere else and Moderna was available, you could get interchange COVID vaccines but that's very very rare.

From the CDC website:

In exceptional situations in which the first-dose vaccine product cannot be determined or is no longer available, any available COVID vaccine may be administered at a minimum interval of 28 days between doses to complete the vaccination series.

More information about the interchangeability of COVID vaccines here >>

Presenters include:

Dr. Jamal Gwathney, Clinical Director, Metropolitan Correctional Center, San Diego Federal Bureau of Prisons; National Public Health Officer
Dr. Rodney Hood, President and Chairman, Multicultural Health Foundation, and Tri-Chair, COVID-19 Vaccine Advisory Committee
Dr. Wilma Wooten, Public Health Officer and Director of Public Health Services, County of San Diego, Health and Human Services Agency

Click here for the latest COVID-19 information in the County of San Diego >>

* Funded by the County of San Diego in support of the Live Well San Diego vision.

Get in touch with our team.

Send us a message by filling out this form or call (619) 915-6734. We'll get back to you as soon as possible.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.


Together Against COVID is an initiative led by the Multicultural Health Foundation (MHF) in partnership with the County of San Diego. MHF's mission is to bring health justice and wellness to the multicultural communities of San Diego County by focusing resources on the most vulnerable populations with community-based wellness strategies, social-clinical interventions, and research that will lead to the elimination of racial and ethnic health disparities. For more information, please contact us at (619) 915-6734.