Ricin chain A. This vaccination is effective for several months due to the body's production of antibodies to the foreign protein. In 1978 Bulgarian defector Vladimir Kostov survived a ricin attack similar to the one on Georgi Markov, probably due to his body's production of antibodies. When a ricin-laced pellet was removed from the small of his back it was found that some of the original wax coating was still attached. For this reason only small amounts of ricin had leaked out of the pellet, producing some symptoms but allowing his body to develop immunity to further poisoning. The seeds of
Killer Cop released in Italy on March 27, 1975 where it was distributed by Prouzioni Atlas consorziate (P.A.C.). It grossed 854,798,250 Italian lire. "Killer Cop" has been released on DVD in Italy by Cecchi Gori with a running time of 92 minutes and 58 seconds. Killer Cop Killer Cop () is a 1975 Italian poliziottesco-crime film directed in 1975 by Luciano Ercoli. The film's plot reprises the very real Piazza Fontana bombing which happened in Milan in 1969. The gun in the umbrella used in the movie is similar to a Bulgarian umbrella used at London in 1978 to kill Bulgarian dissident