COVID-19 Vaccine Information

For questions about COVID-19 or assistance with registering to receive the COVID-19 vaccine,
please call the Information Hotline at 636-949-1899, 8 a.m.-5 p.m., Monday-Friday.

Graphic button to connect to link for scheduling Pediatric Pfizer COVID vaccine appointments
Click button to schedule a Pfizer/BioNTech COVID vaccination in St. Charles County, Missouri
Click button to schedule a Moderna COVID vaccination in St. Charles County, Missouri
Vaccine News and Updates
  1. May 23, 2022 | Upcoming COVID Vaccination Events

    St. Charles County offers free and convenient vaccinations to eligible individuals for all authorized COVID-19 vaccines. Appointments are preferred, but walk-ins are welcome in some cases. Call 636-949-1899 to schedule appointments or for more info. View upcoming events...
  1. UPDATED May 20, 2022 | COVID Booster Vaccinations Authorized for those Ages 5+

    The Department of Public Health is authorized to administer booster vaccinations to individuals ages 5 and older who have completed the recommended regimen for the COVID-19 vaccines and meet eligibility requirements. Read on...
  1. Aug 10, 2021 | Obtaining a Replacement Vaccination Card

    Individuals who have lost or did not receive a COVID vaccination card after being vaccinated may pick up a replacement card through St. Charles County's Immunization Clinic. Cards are issued on Wednesdays only. Read on...
View All News

Clinical studies show vaccination is safe and highly effective in:

  • Preventing COVID-19 infection.
  • Reducing the risk for severe complications and hospitalization.
  • Stopping the spread of the virus.

St. Charles County Public Health is authorized by the Missouri Department of Health and Senior Services (DHSS) to administer free COVID-19 vaccinations to those ages 5 and older. This includes first, second, third and booster doses of the Pfizer/BioNTech, Moderna or Janssen (Johnson & Johnson) vaccines to those who are eligible.

Pediatric COVID-19 Vaccinations

First and second doses of the Pfizer/BioNTech Pediatric COVID vaccine are available by appointment for those ages 5-11. Individuals ages 17 and younger must be accompanied by a parent or guardian at the time of vaccination.

Available Vaccinations

  Moderna Pfizer
Janssen (Johnson & Johnson)
Who is eligible? 18 years and older 5 years and older 18 years and older
When do you receive a second dose? 28 days after first dose 21 days after first dose No second dose in the primary series
When should you receive a booster dose? 5 months after second dose 5 months after second dose 2 months following single-dose series
What type of booster dose is recommended? Either mRNA vaccine (Pfizer or Moderna) Either mRNA vaccine (Pfizer or Moderna for 18 years and older only) CDC recommends receiving either mRNA vaccine (Pfizer or Moderna) as a booster dose.
Who is eligible for a booster dose? 18 years and older

A third primary dose for those who are immunocompromised is recommended over a booster dose
Ages 12 and older

Immunocompromised children


18 years and older

After completing the primary series, some moderately or severely immunocompromised people should get an additional primary dose.

Everyone 12 years and older, including immunocompromised people, should get a booster shot when eligible. If you are eligible for an additional primary shot, you should receive this dose first before receiving a booster shot.

Register to Receive COVID-19 Vaccine

Individuals can schedule a vaccination appointment with the St. Charles County Department of Public Health (SCCDPH) online or by calling the COVID Information Hotline at 636-949-1899. 

Vaccination Distribution

The DHSS website reports the total number of vaccines administered throughout Missouri, as well as information specific to St. Charles County residents.