AQSs by both doctors on opposite sides of an off-white 5 x 3 card. Salk writes: “The full value of vaccination as a means to the control of the infectious and parasitic diseases is yet to be realized.” On the reverse, Cooley writes: “The current experience with the artificial heart has been encouraging for further clinical trials as a bridge to cardiac transplantation.” Stray ink mark touching one word of Salk’s quotation and very subtle show-through, otherwise fine condition. R&R COA.
