Moderately or severely immunocompromised people age 18 or older who received an initial Johnson & Johnson COVID-19 vaccine for their primary vaccination should receive an additional dose of an mRNA vaccine (Pfizer or Moderna) at least 28 days after their first Johnson & Johnson dose.

The CDC recommends people 5 and older receive an age-appropriate, updated mRNA booster dose if at least 2 months have passed since their primary series or since their most recent booster dose. The monovalent Novavax booster and the Johnson & Johnson primary and booster vaccinations are authorized for people 18 and older in limited situations.

Get more information from the Centers for Disease Control and Prevention. Please talk to your doctor if you have questions. The recommended vaccination schedule from the Centers for Disease Control and Prevention is available here.