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Immune System and Disorders clinical trials recruiting in the U.S.

43 studies for Immune System and Disorders are recruiting participants at sites across the United States.

Your immune system is made up of cells, tissues, and organs that fight infections and diseases. Learn how it works, and about diseases of the immune system.

Cities with the most studies

• Washington, DC13 studies
• New York City, NY12 studies
• Philadelphia, PA10 studies
• Boston, MA10 studies
• Atlanta, GA9 studies
• Houston, TX9 studies
• Portland, OR9 studies
• Cleveland, OH8 studies
• Los Angeles, CA8 studies
• Chicago, IL8 studies
• Milwaukee, WI6 studies
• Cedar Rapids, IA6 studies
• Seattle, WA6 studies
• Durham, NC5 studies
• Tampa, FL5 studies
• Nashville, TN5 studies
• Baldwin Park, CA5 studies
• Salt Lake City, UT5 studies
• St. Louis, MO4 studies
• Dallas, TX4 studies
• Pittsburgh, PA4 studies
• Clifton, NJ4 studies
• Greenville, NC3 studies
• Kansas City, MO3 studies
• Norfolk, VA3 studies
• Louisville, KY3 studies
• San Diego, CA3 studies
• The Bronx, NY3 studies
• Indianapolis, IN3 studies
• New Haven, CT3 studies
• Denver, CO3 studies
• Orlando, FL3 studies
• Columbus, OH3 studies
• Rochester, MN3 studies
• San Francisco, CA3 studies
• Phoenix, AZ3 studies
• Mountain View, CA3 studies
• Omaha, NE3 studies
• Richmond, VA3 studies
• Cincinnati, OH3 studies

By state

• Arizona3 studies
• Arkansas3 studies
• California18 studies
• Colorado4 studies
• Connecticut3 studies
• District of Columbia3 studies
• Florida11 studies
• Georgia10 studies
• Illinois9 studies
• Indiana4 studies
• Iowa6 studies
• Kentucky4 studies
• Maryland13 studies
• Massachusetts10 studies
• Michigan4 studies
• Minnesota4 studies
• Missouri6 studies
• Nebraska3 studies
• New Jersey6 studies
• New York14 studies
• North Carolina7 studies
• Ohio9 studies
• Oregon9 studies
• Pennsylvania12 studies
• South Carolina3 studies
• Tennessee5 studies
• Texas14 studies
• Utah5 studies
• Virginia6 studies
• Washington7 studies
• Wisconsin6 studies

Recently updated studies

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.