An estimated 115,000 Minnesotans with weakened immune systems are eligible for another round of COVID-19 vaccine since federal health officials gave final approval to third shots on Friday.
But the third jab of the Pfizer or Moderna vaccines is not for everyone, such as those with common chronic conditions like diabetes, hypertension or high cholesterol.
The Centers for Disease Control and Prevention said the third shot can be given to organ or stem cell transplant recipients, cancer patients, those with uncontrolled or advanced HIV, people being treated with high-dose corticosteroids or other immune-suppressing drugs and other diseases that suppress the body's ability to fight infections.
Most people who are eligible are likely to be under the regular care of a doctor who is monitoring their condition.
The additional shot was added because studies showed that the Pfizer and Moderna COVID-19 vaccines were less effective in the immunocompromised population. The Johnson & Johnson vaccine was not included in the federal government's review.
"The recommendations that are being made right now are based on strong data," state infectious disease director Kris Ehresmann said. "Before booster doses for the general public would be recommended we would need to have clear data for those recommendations.
"The idea if two is good, three is better is not necessarily true" in all cases, she added. "In the absence of a recommendation, just seeking additional vaccine is not the right thing to do."
The vaccines are still effective in those who do not have compromised immune systems.