title: Dr. Samuel Gelston (1727-82), variolator, and his son, Dr. Roland Gelston (1761-1829), vaccinator, from Nantucket.
mesh_terms: D049671:History, 18th Century; D008404:Massachusetts; D012899:Smallpox / Q000266:history* / Q000517:prevention & control; D014611:Vaccination / Q000266:history*