The Centers for Disease Control and Prevention (CDC) recently updated its guidelines for shortening the waiting time for COVID-19 booster shots for moderately or severely immunocompromised patients receiving either Pfizer-BioNTech or Moderna mRNA vaccines.
The CDC now states that Pfizer BioNTech vaccine recipients 12 years of age and older and Moderna vaccine recipients 18 years of age and older may receive a booster shot three months after completing the two-dose COVID-19 vaccine series and receiving the third dose ( additional primary dose), down from the previously recommended five-month intervals.
Moderate to severely immunocompromised individuals 18 years of age and older who received a single dose of the Johnson & Johnson (J&J) vaccine should receive an additional dose of a Pfizer-BioNTech or Moderna vaccine 28 days after the J&J vaccine. A booster shot of either the Pfizer-BioNTech or Moderna vaccine is recommended two months after the second shot. That time frame has not changed.