Jenner_watermark Published September 30, 2014 at 731 × 575 in Dusting off a Treasure: Cleaning and Rehousing the Ladd Collection Edward Jenner (1749–1823) performing his first vaccination upon a country boy, James Phipps, using matter from the arm of milkmaid, Sarah Nelmes, who had contracted cow-pox, May 14, 1796. Engraving by C. Manigaud after a drawing by E. Hamman.