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

46 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
• Boston, MA10 studies
• Portland, OR10 studies
• Atlanta, GA10 studies
• Philadelphia, PA10 studies
• Houston, TX9 studies
• Los Angeles, CA9 studies
• Cleveland, OH8 studies
• Chicago, IL8 studies
• Seattle, WA6 studies
• Milwaukee, WI6 studies
• Tampa, FL6 studies
• Dallas, TX6 studies
• Cedar Rapids, IA6 studies
• Baldwin Park, CA5 studies
• Salt Lake City, UT5 studies
• Durham, NC5 studies
• Nashville, TN5 studies
• Pittsburgh, PA4 studies
• Phoenix, AZ4 studies
• Clifton, NJ4 studies
• Orlando, FL4 studies
• San Diego, CA4 studies
• St. Louis, MO4 studies
• Indianapolis, IN4 studies
• Omaha, NE3 studies
• Rochester, MN3 studies
• Buffalo, NY3 studies
• Denver, CO3 studies
• Fargo, ND3 studies
• Miami, FL3 studies
• Lewisville, TX3 studies
• Mountain View, CA3 studies
• Greenville, NC3 studies
• Richmond, VA3 studies
• Columbus, OH3 studies
• San Francisco, CA3 studies
• New Haven, CT3 studies
• Cincinnati, OH3 studies

By state

• Arizona5 studies
• Arkansas4 studies
• California19 studies
• Colorado5 studies
• Connecticut3 studies
• District of Columbia3 studies
• Florida13 studies
• Georgia13 studies
• Illinois10 studies
• Indiana4 studies
• Iowa6 studies
• Kentucky4 studies
• Maryland14 studies
• Massachusetts10 studies
• Michigan5 studies
• Minnesota4 studies
• Missouri6 studies
• Nebraska3 studies
• New Jersey6 studies
• New York15 studies
• North Carolina8 studies
• North Dakota3 studies
• Ohio9 studies
• Oregon10 studies
• Pennsylvania13 studies
• South Carolina3 studies
• Tennessee6 studies
• Texas17 studies
• Utah5 studies
• Virginia7 studies
• Washington7 studies
• Wisconsin6 studies

Recently updated studies

From ClinicalTrials.gov, data retrieved Nov 15, 2026. Each study sets its own eligibility; the study team decides who can join.