Two items signed by the polio vaccines developers: a felt tip signature, "Jonas Salk," on an off-white 5 x 3 card; and an ink signature and inscription, "May 30, 1978, Best wishes to Jerry Shoemaker of Kettering, Ohio, Albert B. Sabin," on a sheet of 8.5 x 11 Medical University of South Carolina letterhead. In very good to fine condition, with light creasing to Sabin. Accompanied by 1978 transmittal letter from The Salk Institute for Salk's autograph.
