Anne O'Garra FRS FMedSci (born 1954)[1] is a British immunologist who has made important discoveries on the mechanism of action of Interleukin 10.

In 1987, O'Garra left England for Palo Alto, California, to work for the DNAX Research Institute, where by 2000 she had become a principal staff scientist in the department of immunobiology.

O'Garra is known for her contributions to the understanding of the intricate network of cell-cell and cytokine interactions regulating the induction and suppression of cellular immune responses.

She also discovered that dendritic cells produce the interleukin essential for activation of T-cells (IL-12) and subsequent eradication of intracellular pathogens and that IL-10 regulates this production.

[8] In 2020, the International Cytokine and Interferon Society bestowed an Honorary Lifetime Membership Award to O'Garra for her seminal and original contributions to the field.