The Pfizer & BioNTech COVID-19 Vaccine Studies

The Studies

We are profoundly grateful to the over 46,000 people participating in our landmark COVID-19 vaccine clinical trial. Because of them, we are now able to enroll volunteers in new studies that will help us learn more about the vaccine for specific groups of people.

Immunocompromised study

The COVID-19 Vaccine Study For Immunocompromised Patients

For adults and children 2-17. No longer enrolling.

Booster study


For adults ages 18-30. No longer enrolling.

Omicron Variant study

The COVID-19 Omicron Variant BA.4/BA.5 Targeted Vaccine Study

For previously vaccinated and boosted people 12 years and older. No longer enrolling.

An Important Contribution

We believe developing vaccines is key to defeating this pandemic and helping to provide protection from this devastating disease. It's only with the help of people like you that a COVID-19 vaccine could be developed.

While thousands of participants around the world have made a difference in the fight against COVID-19, our understanding of this virus is far from complete. We are now enrolling volunteers for additional studies in order to gather important information about how the investigational vaccine works for broader populations.

Each and every person who volunteers for a clinical trial plays a powerful role. Joining a clinical trial is an important and personal decision. We hope it is one you will consider.

Be Represented

While everyone needs to be represented in vaccine clinical trials, it is especially important that these vaccine trials include people from the communities most significantly impacted by COVID-19. By choosing to volunteer, you will represent people like you — in age, gender, race, ethnicity, and from communities like yours. Involving people from all backgrounds will improve the development of this investigational vaccine for everyone. By volunteering for a COVID-19 vaccine study, you can make a difference.


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