Final answer:
Sir Austin Bradford Hill, who lived from 1897 to 1991, made significant contributions to epidemiology, including research linking smoking to lung cancer, building upon the earlier foundational work of Dr. John Snow.
Step-by-step explanation:
In the field of epidemiology, the person who lived from 1897 to 1991 is Sir Austin Bradford Hill. He is renowned for his seminal work alongside Richard Doll to establish a statistical link between tobacco smoking and lung cancer. While Dr. John Snow (1813-1858) is often hailed as the father of epidemiology for his groundbreaking work in tracing the source of the cholera outbreaks in London, Sir Austin Bradford Hill made significant contributions to the field in the mid-20th century. Snow's practice of meticulous case-tracking and his application of epidemiological methods to public health responses set a precedent that was carried forward and expanded upon by Hill and others. Hill's work, which includes the establishment of cohort studies, further demonstrates the transition of epidemiology towards studying noninfectious diseases and refining the methods and applications of epidemiological research.