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- United States microbiologist (born in Poland) who developed the Sabin vaccine that is taken orally against poliomyelitis (born 1906)Video Player is loading.0 التعليقات 0 المشاركات 5743 مشاهدةالرجاء تسجيل الدخول , للأعجاب والمشاركة والتعليق على هذا!
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