Jenner Township, Somerset County, Pennsylvania named in honor of Dr. Edward Jenner, discoverer of the smallpox vaccine. Early Jenner Township settlers were primarily German and English speakers engaged in agriculture. Pennsylvania Dutch was still spoken in rural parts of the township until the 1960s. Jenner Crossroads, the township's first substantial European settlement, grew near a grist mill and tavern stop established about 1800 along the Pennsylvania Road. Samuel Steel built a sawmill at Jenner Crossroads in 1817; John Shopwood opened a hotel in 1825, and Samuel Elder opened the first store in 1836 Other early industry in the township included a sawmill on Quemahoning Creek
Sir William Jenner, 1st Baronet Sir William Jenner, 1st Baronet Sir William Jenner, 1st Baronet, GCB, QHP, FRCP, FRS (30 January 1815 – 11 December 1898) was a significant English physician primarily known for having discovered the distinction between typhus and typhoid. Jenner was born at Chatham on 30 January 1815, and educated at University College London. He became a Member of the Royal College of Surgeons of England (M.R.C.S.) in 1837, a Fellow of the Royal College of Physicians (F.R.C.P.) in 1852, and in 1844 took the London M.D. In 1847 he began at the London Fever Hospital investigations into cases of continued fever