He coordinated the CDC’s involvement in an international campaign to eradicate smallpox, a historically deadly scourge. The campaign was hugely successful. The last naturally occurring smallpox case was reported in the late 1970s. It also was one of the agency’s first major steps into international public health, a field in which the CDC is now considered a leader.
But for most people, Dr. Sencer is first remembered for his involvement in the 1976 swine flu vaccination campaign.
Health officials became alarmed when cases of a flu virus linked to swine were detected in soldiers at Fort Dix, N.J., including one young man who died. It reminded them of the Spanish flu pandemic that caused millions of deaths around the world in 1918 and 1919.
Dr. Sencer coordinated a series of high-level meetings and recommended to President Gerald Ford that a national vaccination campaign be launched to prevent widespread deaths and illnesses. More than 40 million Americans were vaccinated, but the epidemic never materialized. Worse, the government began to receive dozens of reports of a paralyzing condition called Guillain-Barre syndrome that was blamed on the vaccine. The campaign was suspended in December of that year and Dr. Sencer lost his job. “He was the scapegoat,’’ said Dr. Howard Markel, a University of Michigan medical historian who knew Dr. Sencer.
But public health specialists understand why he chose to be aggressive, and Dr. Sencer will be remembered fondly in that community, Markel added.
“I’d rather have somebody who overreacted’’ than someone who didn’t do enough, he said.
Dr. Sencer also was in charge in 1976 when CDC investigators identified the bacteria behind an outbreak of strange lung infections at a Philadelphia convention of the American Legion. The condition would become known as Legionnaires’ disease.
“He was the longest-serving CDC director and he may have been the most popular,’’ said Dr. Stephen Thacker, a CDC official who was a young investigator on the Legionnaire’s case.
He was “a walk-around director’’ who regularly prowled the agency’s halls and asked people what they were working on, added Thacker, the CDC’s deputy director for surveillance, epidemiology, and laboratory services
After he left CDC, he took a variety of positions, including heading New York City’s health department, which traditionally has been counted — along with CDC director — as one of the top jobs in US public health.
In recent years, he remained an energetic and regular presence at the CDC. He was an adviser for the agency during the 2009 swine flu pandemic, and was sometimes used as a de facto CDC historian. He retained his love for the field of public health and often attended seminars in which young investigators discussed their cases.
Dr. Sencer was born in Grand Rapids, Mich., and got his medical degree from the University of Michigan and a master’s degree in public health from Harvard University.
He leaves his wife, Jane, and three children.
