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Samuel L. Katz, a developer of the measles vaccine, dies at 95


An undated photo provided by Duke University shows Dr. Alan Katz, a virologist who was part of the research team that developed the measles vaccine. Katz died on Oct. 31, 2022, at his home in Chapel Hill, N.C. He was 95.

By Richard Sandomir


Dr. Samuel L. Katz, a virologist who was part of the research team at Harvard Medical School that developed the measles vaccine, an advance more than half a century ago that has saved countless lives, died Oct. 31 at his home in Chapel Hill, North Carolina. He was 95.


His son David confirmed the death.


Katz later enhanced the reputation of the pediatrics department at the Duke University School of Medicine as its chair.


Katz took up the fight against measles in 1956, when he joined a laboratory at Children’s Hospital Medical Center (now Boston Children’s Hospital) run by Dr. John Enders. Two years earlier, Enders had shared the Nobel Prize in physiology or medicine for discovering how to grow the polio virus in cultures, a breakthrough that was critical to Jonas Salk’s development of a polio vaccine, which led to widespread successful immunizations.


Enders’ lab had already isolated the measles virus from a 13-year-old boy when Katz arrived there as a research fellow. Measles was a major medical threat at the time: In the decade before the vaccine was made available in 1963, nearly every child in the United States had measles by age 15, with 3 to 4 million people infected by it every year, leading to an estimated 400 to 500 deaths annually, according to the Centers for Disease Control and Prevention.


Worldwide, measles killed 2.6 million people a year before the availability of vaccines, the World Health Organization said.


“I was put to work with a visitor from Yugoslavia, Milan Milovanovic, who taught me a lot of practical, at-the-bench work,” Katz told Dartmouth Medicine, an alumni magazine, in 2009. “We worked together on adapting the virus to different cell systems and to eggs and eventually to chick embryo cells” — a process that led to the weakening of the virus so it could stimulate an immune response without causing serious side effects.


Katz was involved in inoculating rhesus monkeys with the virus.


“And when we put the chick virus into monkeys, they didn’t develop viremia” — a virus in the blood — “they didn’t develop fever, they didn’t develop any sort of nasal congestion or conjunctivitis or rash, they were perfectly fine,” he said on the podcast “Open Forum Infectious Diseases” in 2014. “But they developed antibodies.”


The chick virus was injected into students at a state school for children with neurological and central nervous system problems, a group whose use by the lab reflected a time of looser ethical standards about test subjects.


“At the end of several weeks, they had antibodies to the measles virus,” Katz recalled.


He became a research associate in the lab in 1958 and kept that title for the next decade, during which he was also a pediatrician at Children’s Hospital and Beth Israel Hospital in Boston and an assistant professor of pediatrics at Harvard Medical School.


Samuel Lawrence Katz was born on May 29, 1927, in Manchester, New Hampshire. His father, Morris, was a railroad executive; his mother, Ethel (Lawrence) Katz, was a homemaker.


He entered Dartmouth College in 1944, hoping to become a journalist. His interest changed to medicine a year later, when he enlisted in the Navy and was sent to hospital training school in San Diego.


He returned to Dartmouth after the war and earned a bachelor’s degree in political science in 1948. He also took the pre-med courses required to enter Dartmouth’s medical school, a two-year school then. He graduated with a bachelor’s in medical science in 1950 and from Harvard Medical School in 1952.


Katz left Harvard for the Duke University School of Medicine in 1968. As chair of its pediatrics department for 22 years, he helped raise its national standing.


“He had such a command of virology and clinical practice and was engaging in a very positive way,” Dr. Mary Klotman, dean of the Duke medical school, said in a phone interview. “He was a role model for the integration of science, clinical care and mentoring the next generation of clinicians.”


Katz stepped down from running the Duke pediatrics department in 1990 to work with his second wife, Dr. Catherine Wilfert, an HIV/AIDS researcher and activist and professor of pediatrics at the Duke medical school. She was the principal investigator in a pediatric AIDS clinical trial, beginning in 1987, that showed the efficacy of using the drug AZT to reduce the incidence of mother-to-child transmission of HIV by over 60%.


Wilfert left Duke in 1996 and became scientific director of the Elizabeth Glazer Pediatric AIDS Foundation. Katz continued to teach at Duke until retiring in 2017.


In addition to his son David, he is survived by two other sons, John and William; five daughters, Deborah Miora, Susan Calderon, Penelope Katz Facher, Rachel Wilfert and Katie Regen; and 17 grandchildren. His marriage to Betsy Cohan ended in divorce. His marriage to Wilfert ended with her death in 2020. His son Samuel Jr. died in 1980.

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