answer:
The delivery method of the ricin used in the attack on Georgi Markov was a pellet shot from an umbrella.
Symptoms of ricin poisoning include nausea, vomiting, diarrhea, abdominal pain, and difficulty breathing. In more severe cases, organ damage and death can occur.
They found traces of ricin in Markov's tissue samples.
In the Tylenol tampering case, seven people died.
The circumstances surrounding the deaths were that the victims had all taken Tylenol capsules that had been laced with cyanide.
The tampering likely occurred in the Chicago area, as the victims were all from the city and the surrounding suburbs. Investigators determined that the tampering occurred at the retail level, as the bottles had only been opened after they had been purchased and brought home.
The significance of this case is that it led to the introduction of tamper-proof packaging and increased safety regulations for over-the-counter medications. It also raised public awareness about the importance of product safety.