Right now, the boosters are available to people 65 and older, people who live in long-term care settings and those 50 to 64 with underlying medical conditions.
It may also be for people who have an occupational risk of exposure to COVID-19 or people in institutional settings.
No booster doses of the vaccine are recommended for healthy people who have received two doses of the Moderna vaccine or the one dose Johnson & Johnson COVID-19 vaccine.
Cleveland Clinic says guidance on that is forthcoming.
The FDA and CDC have also approved third doses of both the Moderna and Pfizer COVID-19 vaccines for certain patients with compromised immune systems who received their first two doses of an mRNA COVID-19 vaccine.