In 1942, Terry joined the staff of the Public Health Service Hospital in Baltimore, becoming Chief of Medical Services there the following year. His interest in
cardiovascular research led him to accept the position of Chief of General Medicine and Experimental Therapeutics at the National Heart Institute in
Bethesda in 1950, at first on a part-time basis while continuing his work at the Baltimore hospital. When the
National Institutes of Health's Clinical Center opened in 1953, Terry's Heart Institute program was moved to the new facility and he devoted his full-time to the job. He also served as the first Chairman of the Medical Board of the Clinical Center (1953–1955) and was concurrently instructor and then assistant professor at the
Johns Hopkins University School of Medicine from 1944 to 1961. Terry and his team laid the foundations for what has been called "the golden era of cardiovascular clinical investigation".
Surgeon General In 1958, Terry became the Assistant Director of the
National Heart Institute. He came to public prominence when President
John F. Kennedy selected him as Surgeon General of the Public Health Service, effective March 2, 1961. Although there had always been an awareness of the negative health effects of smoking, it was not until the 1950s that evidence began to be published suggesting that
cigarette smoking caused lung cancer and other diseases. At the end of the decade, the
Royal College of Physicians in the United Kingdom appointed a committee to investigate the relationship between smoking and health. The committee's report, issued on March 7, 1962, clearly indicated cigarette smoking as a cause of lung cancer and
bronchitis and argued that it probably contributed to
cardiovascular disease as well. Shortly after the release of this report, Terry established the Surgeon General's Advisory Committee on Smoking and Health, which he chaired, to produce a similar report for the United States.
Smoking and Health: Report of the Advisory Committee to the Surgeon General of the Public Health Service, released on January 11, 1964, concluded that lung cancer and
chronic bronchitis are causally related to cigarette smoking. The report also noted out that there was suggestive evidence, if not definite proof, for a
causative role of smoking in other illnesses such as
emphysema, cardiovascular disease, and various types of cancer. The committee concluded that cigarette smoking was a health hazard of sufficient importance to warrant appropriate remedial action. In June 1964, the
Federal Trade Commission voted by a margin of 3–1 to require that cigarette manufacturers "clearly and prominently" place a warning on packages of cigarettes effective January 1, 1965, stating that smoking was dangerous to health, in line with the warning issued by the Surgeon General's special committee. The same warning would be required in all cigarette advertising effective July 1, 1965. The landmark Surgeon General's report on smoking and health stimulated a greatly increased concern about tobacco on the part of the American public and government policymakers and led to a broad-based anti-smoking campaign. It also motivated the
tobacco industry to intensify its efforts to question the scientific evidence linking smoking and disease. The report was also responsible for the passage of the
Cigarette Labeling and Advertising Act of 1965, which, among other things, mandated Surgeon General's health warnings on cigarette packages. Cigarette smoking of nicotine was defined as not an
addiction in the Surgeon General's first report on smoking (published by a committee of doctors who were largely smokers themselves). ==Later years==