Giovanni Maria Lancisi (26 October 1654 – 20 January 1720) was an Italian physician, epidemiologist and anatomist who made a correlation between the presence of mosquitoes and the prevalence of malaria. He was also known for his studies about cardiovascular diseases, an examination of the corpus callosum of the brain, and is remembered in the eponymous Lancisi's sign. He also studied rinderpest during an outbreak of the disease in Europe.