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Tuesday, November 10, 2026Nov 10

What you need to know about COVID-19 booster shots in Hamilton County

Staff photo by Troy Stolt / Christian Mckibbens is given a COVID-19 vaccine by paramedic Robert Blackburn during a block party put on by Get Vaccinated Chattanooga at the Emma Wheeler Homes on Saturday, Aug. 21, 2021 in Chattanooga, Tenn.
Staff photo by Troy Stolt / Christian Mckibbens is given a COVID-19 vaccine by paramedic Robert Blackburn during a block party put on by Get Vaccinated Chattanooga at the Emma Wheeler Homes on Saturday, Aug. 21, 2021 in Chattanooga, Tenn. Staff photo by Troy Stolt / Christian Mckibbens is given a COVID-19 vaccine by paramedic Robert Blackburn during a block party put on by Get Vaccinated Chattanooga at the Emma Wheeler Homes on Saturday, Aug. 21, 2021 in Chattanooga, Tenn.

The Hamilton County Health Department is encouraging fully vaccinated individuals with weakened immune systems who are now eligible for a COVID-19 vaccine booster to seek a third shot, as the department is preparing to open up boosters for all residents in about a month.

The new recommendation applies only to those who received their second dose of the Pfizer or Moderna COVID-19 vaccines four or more weeks ago and have immune-compromising conditions. That can include organ transplant recipients and those actively undergoing cancer treatment or taking high-dose steroid medication or other drugs that weaken the immune response.

Immune-compromised people typically don’t mount as strong of a response to vaccines in general and could benefit from additional protection, according to a news release from the health department.

Health Department Administrator Becky Barnes said during a news briefing Friday that no proof is required to receive a third shot, and a full list of eligible conditions is available on the department’s website. Individuals are encouraged to speak with their health care provider to decide if a booster is right for them, Barnes said.

“If you are one of those persons, I would encourage you to seek that third dose,” she said, adding that the department is ramping up efforts to offer boosters to the general population sometime around Sept. 20.