Two photos: a matte-finish 4.75 x 7 half-length photo of Albert Sabin, who is remembered for his development of a practical oral polio vaccine, signed and inscribed in the lower border in black ink, "For Joe Balmer—best wishes—Albert B. Sabin"; and a glossy 3.5 x 5.5 half-length photo of South African cardiac surgeon Christiaan Barnard, who performed the world's first human-to-human heart transplant on December 3, 1967, signed in black ink, "Christiaan Barnard," with an accompanying compliment slip. In overall fine condition.
