Francis Peyton Rous was an accomplished American immunologist who made significant contributions to the field of tumor virology. Some synonyms for Rous could include "immunologist," "scientist," "researcher," "tumor virologist," and "Nobel Laureate." Rous received the Nobel Prize in Physiology or Medicine in 1966 for his discovery of tumor-inducing viruses, specifically the Rous sarcoma virus. His research paved the way for understanding the link between viruses and cancer, ultimately leading to the development of cancer treatments and prevention methods. Rous's legacy continues to inspire and inform scientists in their work to combat cancer and infectious diseases.