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
Sackville Street, London Sackville Street, London Sackville Street is a street in central London which today is mainly composed of offices and the rears of retail premises, but once was the home to several important medical figures. The street runs between Vigo Street in the north and Piccadilly in the south. It has no other exits. The land on which Sackville Street stands, like Albany and Burlington House, was formerly known as Stone Conduit Close. It was bounded on one side by Penniless Bank and on the other by Swallow Close. It passed into Crown ownership in 1536 and formerly belonged to the