The last available booster shot in many places was the third shot, way back in I think 2021. That’s “the most up to date and available booster” in many countri

The last available booster shot in many places was the third shot, way back in I think 2021. That’s “the most up to date and available booster” in many countries. The boosters since have been often only available to healthcare workers, the elderly, or those with preexisting conditions.