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.

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Vaccine News and Updates
  1. June 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. June 22, 2022 | Public Health to Offer COVID-19 Vaccinations for Ages 6 Months and Older

    Following authorization granted by the State of Missouri, the U.S. FDA and the CDC, St. Charles County Public Health will now offer the Pfizer and Moderna COVID-19 vaccinations for those ages 6 months and older. Read on...
  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...
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Clinical studies show vaccination is safe and highly effective in:

  • Preventing COVID-19 infection.
  • Reducing the risk for severe complications and hospitalization.

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 6 months 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

In June 2022,  DHSS, the U.S. Food and Drug administration (FDA), and the Centers for Disease Control and Prevention (CDC) authorized the administration of the Pfizer/BioNTech and Moderna COVID vaccines to those ages 6 months and older. Parents and caregivers should speak with their pediatrician to determine which vaccine is preferred.

Available Vaccinations

  Moderna Pfizer/BioNTech
Janssen (Johnson & Johnson)
Who is eligible? 6 months and older 6 months and older 18 years and older
When do you receive a second dose? 28 days after first dose 21 days after first dose
6 months to 4 years requires a third dose issued 56 days after second 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 5 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 5 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.

Schedule a COVID-19 Vaccine Appointment

Caregivers for individuals ages 6 months to 11 years can schedule a vaccination appointment with the St. Charles County Department of Public Health (SCCDPH) online. Other family members and caregivers may join these appointments to receive first, second, third, or booster doses, according to eligibility. PLEASE NOTE: Individuals ages 17 and younger must be accompanied by a parent or guardian at the time of the vaccination.

Those seeking vaccination appointments solely for individuals ages 12 and older should call St. Charles County's COVID Information Hotline at 636-949-1899. 

Vaccination Distribution

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