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Leading research to understand, treat, and prevent infectious, immunologic, and allergic diseases
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Collaborative Clinical Research Branch (CCRB)

Michael A. Polis, M.D., MPH, Branch Chief

Elizabeth Higgs, M.D., Deputy Branch Chief

Julia A. Metcalf, B.A., Clinical Research Specialist

Susan Orsega, CDR USPHS, Nurse Practitioner

John Powers III, M.D., FACP, FIDSA, Senior Medical Scientist [C]

Louis Grue III, Clinical Project Manager

Sophia Siddiqui, M.D., Medical Officer

Michael Belson, B.S., Microbiologist​​

Last Updated April 27, 2015