Ricin immunogenic in mice, rabbits, and humans. It has completed two successful clinical trials. Ricin has been involved in a number of incidents. In 1978, the Bulgarian dissident Georgi Markov was assassinated by Bulgarian secret police who surreptitiously shot him on a London street with a modified umbrella using compressed gas to fire a tiny pellet contaminated with ricin into his leg. He died in a hospital a few days later and his body was passed to a special poison branch of the British Ministry of Defence (MOD) that discovered the pellet during an autopsy. The prime suspects were the Bulgarian
Gerrard Street, London their dining club, "The Club" in 1764. The site is commemorated by a plaque at No. 9. Citations Sources Gerrard Street, London Gerrard Street （Chinese: 爵祿街）is a street in the West End of London, in the Chinatown area. The street was built between 1677-85 and originally named Gerard Street after the military leader Charles Gerard, 1st Earl of Macclesfield who owned the land and used it as a training area. It was developed by the physician Nicholas Barbon. By the mid-18th century, it was known more for its coffee houses and taverns than as a place of residence. John Dryden