Current CDC guidance recommends the Pfizer-BioNTech vaccine booster dose for specific populations who previously received the Pfizer vaccination — including health-care and at-risk workers. 

Booster vaccinations are not currently required by the School of Medicine, but WashU Occupational Health is offering Pfizer booster doses to all employees and trainees who work on the Medical Campus and initially received the Pfizer vaccine.


The Centers for Disease Control and Prevention (CDC) released new guidelines Sept. 24 expanding eligibility for Pfizer booster vaccinations. The guidelines indicate boosters should be administered at least six months after completion of the primary Pfizer series.

The CDC recommends boosters for people who are:

  • 65 years of age and older
  • Living in long-term care facilities
  • 50 through 64 years of age with underlying medical conditions (cancer, stroke, chronic lung disease, chronic kidney disease, type 1 and type 2 diabetes, heart disease, obesity, pregnancy)
  • Health-care workers and those in jobs that put them at high risk

The CDC also allows (but does not recommend) boosters for people who are:

  • 18 – 49 years of age with underlying medical conditions that put them at risk of severe illness (as noted above).

Boosters extend immunity after the initial shots’ potency starts to decrease over time. This guidance is specific to Pfizer vaccine recipients; there are no booster recommendations yet for the Moderna or Johnson & Johnson/Janssen vaccines.

Getting your booster

Booster shots can be scheduled by emailing or by calling 314-362-3528. Short-term scheduling availability will be limited due to WashU Med’s focus on providing required flu shots. We ask for and appreciate your patience.

You can also obtain a booster at most public clinics or retail pharmacies.