Director, Thrombosis Program
Attending Physician; Hematology, Oncology and Blood and Marrow Transplantation

Assistant Professor of Clinical Pediatrics, Keck School of Medicine of USC
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After attending medical school at Flinders University in Australia, Dr. Jaffray spent the next 6 years of her training on the east coast of the United States. She completed her pediatric residency at the University of Massachusetts and her pediatric hematology/oncology training at the combined Memorial Sloan Kettering Cancer Center/New York Presbyterian Hospital Weill Cornell program. In 2013 she returned to her home state of California to start a two year advanced fellowship in pediatric coagulation at Children’s Hospital Los Angeles under the guidance of Dr. Guy Young. Following the completion of her coagulation fellowship, she stayed at CHLA as a faculty hematologist specializing in pediatric diseases of hemostasis and thrombosis.

Clinical Interests

Thrombosis and Hemostasis


Medical School: 

Flinders University of South Australia


University of Massachusetts Memorial Medical Center


Memorial Sloan Kettering Cancer Center/New York-Presbyterian Hospital of the Weill Medical College of Cornell University



Pediatric Hematology/Oncology 2015, Pediatrics 2012

Professional Memberships: 

American Society of Hematology 2011-present 

American Society of Pediatric Hematology Oncology 2011-present

Hemostasis and Thrombosis Research Society 2012-present

World Federation of Haemophilia 2014-present

International Society on Thrombosis and Haemostasis 2014-present

American Thrombosis and Hemostasis Network 2014-present


Hemostasis & Thrombosis Research Society Abstract & Travel Award, 2015

Stephen M. Thompson Physician Corps Award Recipient, 2014

Hemophilia Academy Awardee, 2013

Hemostasis & Thrombosis Research Society Workshop Grant, 2012

American Society of Hematology Trainee Research Award, 2008


Jaffray, J. & Young, G. Recent trial results in recombinant coagulation factors for the treatment of hemophilia B. Clinical Investigation 2014; 5: 205-16.

Li, J., Hale, J., Bhagia, P., Xue, F., Chen, L., Jaffray, J., Yan, H., Lane, J., Gallagher, P.G., Mohandas, N., Liu, J., An, X. Isolation and transcription analyses of human erythroid progenitors: BFU-E and CFU-E. Blood 2014;124:3635-45.

Jaffray, J. & Young, G. Developmental Hemostasis: Clinical Implications from the Fetus to the Adolescent. Pediatric Clinics of North America 2013; 60 (6):1407-17.

Jaffray, J.A., Mitchell, W.B., Gnanapragasam, M.N., Seshan, S.V., Guo, X, Westhoff, C.M., Bieker, J.J., Manwani, D. Erythroid Transcription Factor EKLF/KLF1 Mutation Causing Congenital Dyserythropoietic Anemia in a Patient of Taiwanese Origin. Blood, Cells, Molecules and Diseases 2013; 51:71-75.

Hu, J., Liu, J., Xue, F., Halverson, G., Reid, M., Guo, A., Chen, L., Raza, A., Jaffray, J., Lane, J., Chasis, JA., Taylor, N., Narla, M., An, A. Isolation and functional characterization of human erythroblasts at distinct stages: implications for understanding of normal and disordered erythropoiesis in vivo, Blood 2013; 121: 3246-53. 

Research Interests: 

Blood clot prevention in hospitalized children and those with central lines, as well as improving the care of girls and young women with bleeding disorders. 

4650 Sunset Blvd.
MS 57
Los Angeles, CA 90027
Phone: 323-361-4624Office
Fax: 323-361-4902Fax