Polonium?
21st century[edit]
Further information: Poisoning of Alexander Litvinenko
The cause of death in the 2006 murder of the Russian KGB agent who defected to the British MI6 intelligence agency, Alexander Litvinenko was determined to be 210Po poisoning.[87][88] According to Prof. Nick Priest of Middlesex University, an environmental toxicologist and radiation expert, speaking on Sky News on December 3, 2006, Litvinenko was probably the first person to die of the acute α-radiation effects of 210Po.[89]
Abnormally high concentrations of 210Po were detected in July 2012 in clothes and personal belongings of the Palestinian leader Yasser Arafat, a heavy smoker, who died on 11 November 2004 of uncertain causes. The spokesman for the Institut de Radiophysique in Lausanne, Switzerland, where those items were analyzed, stressed that the “clinical symptoms described in Arafat’s medical reports were not consistent with polonium-210 and that conclusions could not be drawn as to whether the Palestinian leader was poisoned or not”, and that “the only way to confirm the findings would be to exhume Arafat’s body to test it for polonium-210.”[90] On 27 November 2012 Arafat’s body was exhumed and samples were taken for separate analysis by experts from France, Switzerland and Russia.[91] On 12 October 2013, The Lancet published the group’s finding that high levels of the element were found in Arafat’s blood, urine, and in saliva stains on his clothes and toothbrush.[92] The French tests later found some polonium but stated it was from “natural environmental origin.”[93] Following later Russian tests, Vladimir Uiba, the head of the Russian Federal Medical and Biological Agency, stated in December 2013 that Arafat died of natural causes, and they had no plans to conduct further tests.[93]
Source: Wikipedia
Arafat died of AIDS.