Last updated: October 27, 2021

Booster Doses if You Received 2 Doses of Pfizer-BioNTech or Moderna

You’re eligible to get a booster shot if:

  • It’s been at least 6 months since you got the second dose of a Pfizer-BioNTech or Moderna vaccine
  • AND you are one of the following:
    • 65 years or older; or
    • A long-term care resident or staff member; or
    • 18+ and have an underlying medical condition, including asthma, diabetes, and obesity; or
    • 18+ and have a moderate to severe immunosuppression; or
    • 18+ and work or live in high risk settings, including health care workers, teachers, and grocery store workers

Booster Doses if You Received 1 Dose of Johnson & Johnson

You’re eligible to get a booster shot if:

  • You’re 18+ and it’s been at least 2 months since you got a dose of Johnson & Johnson’s Janssen vaccine.

What to Know About Booster Doses

Examples of “moderate to severe immunosuppression” include: Asplenia, Cancer (Solid Tumor and Hematologic Malignancies), Chronic Renal Disease, HIV, and Organ/Bone Marrow Transplant, along with patients who are taking immune-suppressive medications for autoimmune conditions such as Colitis, Lupus, Multiple Sclerosis, Psoriasis, and Rheumatoid Arthritis. It’s estimated that 2.7% of US adults are immunocompromised patients.

Additional Facts About a Booster Dose:

  • Immunocompromised patients must be at least 28 days from administration of their second vaccine to receive the booster dose.
  • Patients aged 65 and older must be at least 6 months from administration of their second vaccine to receive the booster dose.
  • It’s recommended to receive the same manufacturer as the initial vaccine series.

How Can You Receive a Booster?

Qualifying patients can receive a booster vaccine by walking in at the COVID Vaccine Clinic, calling (573) 556-7745, or booking online here.


The COVID Immunization Clinic is open most Mondays through Fridays 8:30 a.m. to 4:00 p.m., located on the second floor of 1241 W Stadium Blvd.


You can sign up for an appointment by calling our COVID Clinic at (573) 556-7745.

Signing Up – Online

Go to and follow the instructions.

What Else Should I Know?

  • Patients with compromised immune systems may still be at risk for COVID-19, even with the additional vaccine dose. They should continue to take precautions, including wearing masks, avoiding crowded, indoor, poorly ventilated places that are higher risk for spreading COVID-19, and practicing good hand hygiene.
  • Vaccine supply at JCMG remains strong and we are well prepared to administer booster doses to our patients.