IGCSE Edexcel Changes in Medicine : 1848-1948 Flashcards: Komila’s Joana’s Progress in the mid19th century; Nightingale, Chadwick, Snow and Simpson Progress in the mid19th century; Nightingale, Chadwick, Snow and Simpson Discovery and development, 1860–75; Lister and Pasteur Accelerating change, 1875–1905; Ehrlich, Koch and chemistry Government action and war, 1905–20 Advances in medicine, surgery and public health 1920–48; the NHS