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
Umbrella Movement support the movement), Sham Shui Po, Kwai Shing East, Tai Wai, Tuen Mun, Chai Wan, Kwun Tong and other places. New campus of University of Macau, which is located on Zhuhai was hung with banner "Macau also need real universal suffrage" ["sic"], similar that of Hong Kong Umbrella Revolution, for echoing the street protests in the occupied territories of Hong Kong. Rallies in support of the protests occurred in over 64 cities worldwide by October 2014, principally in front of Hong Kong trade missions or Chinese consulates. A demonstration in front of the Chinese embassy in London attracted 3000 participants.