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Marcus Klingberg
Israeli physician (1918-2015) · Poland · On the map · Doctors · Died at 97
Avraham Mordechai Klingberg, known as Marek or Marcus Klingberg, was a Polish-born Israeli epidemiologist and the highest ranking Soviet spy ever uncovered in Israel.
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A typical day, 30 days to 6 November 2026
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![The Russian Orthodox Church in Abu Kabir, southern Tel Aviv, where Klingberg would meet his KGB handlers.[19]](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/Pravos_259.jpg/1280px-Pravos_259.jpg?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail)
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Klingberg made major contributions in the fields of infectious and noninfectious disease epidemiology and military medicine, while simultaneously passing intelligence to the Soviet Union regarding Israel's biological and chemical warfare capacities. Declared the "most important Soviet spy in Israel" by the Jerusalem Post, Klingberg is regarded as causing the greatest damage ever to the country's national security interests.
