Ruth Sonntag Nussenzweig (20 June 1928 – 1 April 2018) was an Austrian-Brazilian immunologist specializing in the development of malaria vaccines.
In a career spanning over 60 years, she was primarily affiliated with New York University (NYU), as C.V.
Starr Professor of Medical and Molecular Parasitology at Langone Medical Center, Research Professor at the NYU Department of Pathology, and finally Professor Emerita of Microbiology and Pathology at the NYU Department of Microbiology.