Albert Sabin a vaccine to prevent or mitigate the illness. The Sabin vaccine is an oral vaccine containing weakened forms of strains of polio viruses. In 1955, Salk's "killed" vaccine was released for use. It was effective in preventing most of the complications of polio, but did not prevent the initial intestinal infection. The Sabin vaccine is easier to give than the earlier vaccine developed by Salk in 1954, and its effects last longer. Sabin first tested his live attenuated oral vaccine at the Chillicothe Ohio Reformatory in late 1954. From 1956–1960, he worked with Russian colleagues to perfect the oral vaccine
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