Massachusetts Medical Society: COVID-19 Vaccine Booster Shots

COVID-19 Vaccine Booster Shots

NEW: The Centers for Disease Control and Prevention (CDC) has updated its booster recommendations to allow certain immunocompromised individuals and people over the age of 50 who received an initial booster dose at least 4 months ago to be eligible for another mRNA booster to increase their protection against severe disease from COVID-19. Separately and in addition, based on newly published data, adults who received a primary vaccine and booster dose of Johnson & Johnson’s Janssen COVID-19 vaccine at least 4 months ago may now receive a second booster dose using an mRNA COVID-19 vaccine.

The Centers for Disease Control and Prevention (CDC) recommends everyone ages 12 years and older get a booster dose. Individuals ages 12–17 can only get a Pfizer-BioNTech COVID-19 vaccine booster. People age 18 and older can get any vaccine and booster (Pfizer-BioNTech or Moderna are preferred).

For individuals who received the Pfizer-BioNTech vaccine, the CDC now recommends booster shots at 5 months after the completion of the primary series for those aged 12 and older.

For individuals who received the Moderna vaccine, the CDC recommends booster shots at 5 months after the completion of the primary series for those aged 18 and older.

For people who got the Johnson & Johnson COVID-19 vaccine, the CDC recommends a Pfizer-BioNTech or Moderna (mRNA COVID-19 vaccines) booster at 2 months after receiving the initial vaccination for those aged 18 and older. Although mRNA vaccines are preferred, J&J/Janssen COVID-19 vaccine may be considered in some situations.

CDC’s recommendations now allow for mix and match dosing for booster shots. Pfizer-BioNTech or Moderna (mRNA COVID-19 vaccines) are preferred. Read more about COVID-19 booster shots.

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