Purim
There is a tale in the Hasidic Chabad movement that supposedly Joseph Stalin died as a result of some metaphysical intervention of the seventh Chabad leader, Rabbi Menachem Mendel Schneerson, during the recitation of a discourse at a public Purim Farbrengen. Stalin was suddenly paralyzed on 1 March 1953, which corresponds to Purim 1953, and died 4 days later. Due to Stalin's death, nationwide pogroms against Jews throughout the Soviet Union were averted, as Stalin's infamous doctors' plot was halted.
Sergei Yudin (surgeon)
Despite his achievements and popularity, Yudin was arrested by the KGB on December 22, 1948. He was held in jail without trial for more than 3 years. His name disappeared from medical journals, articles he had submitted were not published, and his publications were removed from the libraries. In 1952, he was exiled to Siberia for 10 years to the town of Berdsk, which was 30 km away from Novosibirsk. Only after Joseph Stalin’s death in March 1953 Yudin was able to return to Moscow and recommence his work. One year later on June 12, 1954, Yudin died from myocardial infarction at the age of 62 years.