COVID-19 Vaccines

The Weld County Health Department has the Pfizer COVID-19 vaccine available to anyone 5 years or older, in addition to the Pfizer, Moderna, and Johnson & Johnson COVID-19 vaccines for anyone 18 years or older. If you have questions or would like to schedule an appointment at the Health Department Clinic, please call (970) 304-6420

Who can get a COVID-19 vaccine?

All Coloradans age 5 and older are eligible to receive the Pfizer vaccine. For more details about vaccination for children ages 5-17, go to the CDC's COVID-19 Vaccines for Children and Teens webpage.

All Coloradans age 18 and older are eligible to receive the Moderna or Janssen (Johnson & Johnson) vaccine.

Additional Primary Doses for Immunocompromised Populations

If you have a moderately to severely weakened immune system and received either the Pfizer or Moderna vaccines for your first two doses, you should get an additional (third) primary dose of the same vaccine 28 days after the second dose. People age 5-17 who are moderately to severely immunocompromised can only get the Pfizer vaccine as an additional (third) primary dose. The CDC does not recommend mixing products for a two-dose primary series or additional primary doses. 

If you are immunocompromised and you received the Johnson & Johnson vaccine, you should receive an additional (second) dose of a Pfizer or Moderna vaccine 4 weeks later. 

If you became immunocompromised AFTER receiving valid primary series doses of the Pfizer or Moderna vaccine (or 1 Johnson & Johnson vaccine) and a valid booster dose, it is not recommended that you receive an additional dose of vaccine at this time.

If you are eligible for an additional primary dose, you should get it before you get a booster shot. If you are immunocompromised and got 3 primary doses of Pfizer, you should get a booster (fourth) dose 3 months later. If you are immunocompromised and got 3 doses of Moderna, you should get a booster (fourth) dose 3 months later. If you are immunocompromised and got a single initial dose of Johnson & Johnson followed by an mRNA (Pfizer or Moderna) dose, you should get a booster (third) dose 2 months later.

We encourage you to speak with your health care provider if you have questions about whether you are eligible to receive an additional primary dose.

COVID-19 Vaccination Schedule for Immunocompromised People

Booster Shots

COVID-19 booster shots also are available to eligible individuals in the general population who would like one. You should get a booster dose if you:

  • Are 12 or older and received your second dose of Pfizer at least 5 months ago

  • Are 18 or older and received your second dose of Moderna at least 5 months ago

If you received the Johnson & Johnson vaccine, you can get a booster dose of either Pfizer or Moderna 2 months after you first got vaccinated. 

COVID-19 Vaccination Schedule for the General Population

For a booster dose, adults ages 18 years and older may choose which vaccine product they get. CDC recommends either mRNA vaccine (Pfizer or Moderna) in most circumstances. Although mRNA vaccines are preferred, the Johnson & Johnson COVID-19 vaccine may be considered in some situations.

We encourage you to speak with your health care provider if you have questions about boosters. For more details about booster shot recommendations, go to CDPHE's booster shot webpage or the CDC’s booster shot webpage.