Robert Ellis Shope (February 21, 1929 – January 19, 2004) was an American virologist, epidemiologist and public health expert, particularly known for his work on arthropod-borne viruses and emerging infectious diseases. He discovered more novel viruses than any person previously, including members of the Arenavirus, Hantavirus, Lyssavirus and Orbivirus genera of RNA viruses. He researched significant human diseases, including dengue, Lassa fever, Rift Valley fever, yellow fever, viral hemorrhagic fevers and Lyme disease. He had an encyclopedic knowledge of viruses, and curated a global reference collection of over 5,000 viral strains. He was the lead author of a groundbreaking report on the threat posed by emerging infectious diseases, and also advised on climate change and bioterrorism.