Health information on Wikipedia read and required at least a university graduate reading level. The study's authors were concerned by Wikipedia's low readability, as people with autoimmune disorders often use Wikipedia to research their condition. A 2018 study evaluating 55 Wikipedia articles on neurosurgical topics found that they were significantly more difficult to read than the American Association of Neurological Surgeons's patient information articles, although both Wikipedia's articles and the AANS articles required a college reading level. Wikipedia co-founder Jimmy Wales has said that lack of health information increases preventable deaths in emerging markets and that health information from Wikipedia can improve community health.
Wikipedia images disruptively. Obvious vandalism is generally easy to remove from Wikipedia articles; the median time to detect and fix vandalism is a few minutes. However, some vandalism takes much longer to repair. In the Seigenthaler biography incident, an anonymous editor introduced false information into the biography of American political figure John Seigenthaler in May 2005. Seigenthaler was falsely presented as a suspect in the assassination of John F. Kennedy. The article remained uncorrected for four months. Seigenthaler, the founding editorial director of "USA Today" and founder of the Freedom Forum First Amendment Center at Vanderbilt University, called Wikipedia co-founder Jimmy