The Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) have authorized a third dose of the Pfizer and Moderna COVID-19 vaccines, which were initially two-dose vaccines. They also authorized a second dose of the Johnson & Johnson vaccine.
Both federal agencies said that any adult over the age of 18, and who is six months from their second Moderna or Pfizer shot or two months from the Johnson & Johnson shot, should get a booster shot.

