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Participating in Clinical Trials

Vaccines are important tools in protecting against disease. They lower health care costs by reducing infectious diseases in the community and promoting health.

Because of vaccines, millions of people are protected from life-threatening diseases including polio, tetanus, diphtheria, whooping cough, measles, hepatitis B, meningitis and influenza. But additional vaccine development is important for future disease prevention.

Healthy volunteers of all ages, races and genders are needed to continue vaccine development.

Participation in a vaccine study is voluntary and confidential.

All study vaccines and tests are free of charge and volunteers receive compensation for time and travel.

Volunteering in a Study Pre-Screening Phase

If you are interested in participating in a clinical trial at Saint Louis University, contact us at or 314-977-6333. We will ask you questions to determine if you qualify. If an initial phone screening indicates you might be eligible, we will send you a consent form outlining the details of the study, including risks, benefits and purpose, as well as any compensation involved.

After reading the consent form, you may call us back to clarify any questions and/or schedule a screening visit.

Screening Phase

At the beginning of the screening visit you will sign an informed consent form. Every effort will be made to help you understand all the details of the study. If there is anything you do not understand, please ask. Once we have your informed consent, the screening visit will continue in the manner called for by that study's protocol.

Enrollment Phase

If you qualify for the study, you will be scheduled for an enrollment visit and receive the study vaccine. Please note: Screening and enrolling visits sometimes happen at the same time.

Monitoring Phase

You will be monitored after joining the study. We typically gauge your body's immune response through blood samples and ask you to keep a record of how you feel and of any symptoms you experience after receiving study vaccine. This may require additional visits and/or phone calls to the Center for Vaccine Development.

Learn About the Center for Vaccine Development and Find Current Studies