Cold War tensions and the polio vaccine Sabin vaccine from the Soviet side. However other Soviet virologists argued that the Salk vaccine could be considered safe, since the Americans tested it on their own people. They considered that the Sabin vaccine must be potentially dangerous because the Americans did not wish to test it on their own society. The documented achievement of the Sabin-Chumakov collaboration eventually trumped the ideological differences of the Cold War. Their oral live-virus vaccine became federally licensed in 1962, and used for over three decades to help eliminate polio globally, replacing the Salk vaccine. Using these vaccines, the threat of polio remains only
Grass for His Pillow before the pass is closed by snow. Once Spring thaws the snow, Kaede excuses herself from Fujiwara, stating her intention to visit Arai, her overlord, to discuss her future. He reluctantly agrees, and she travels via Terayama, as she has heard that Takeo is there. They meet, and as Takeo is under a death sentence from the Tribe, Kaede sends Shizuka and Kondo away. Against advice, Takeo and Kaede marry at Terayama. Grass for His Pillow Grass for His Pillow is the second novel in Lian Hearn's popular Tales of the Otori trilogy, published in 2003. The events in the