Original sentence: " Vaccination remains controversial within chiropractic.Although most chiropractic writings on vaccination focus on its negative aspects, antivaccination sentiment is espoused by what appears to be a minority of chiropractors.Historically, chiropractic strongly opposed vaccination on the grounds that diseases are traceable to causes in the spine, and therefore cannot be affected by vaccines; Daniel D.Palmer, the founder of chiropractic, wrote, "It is the very height of absurdity to strive to 'protect' any person from smallpox or any other malady by inoculating them with a filthy animal poison.The American Chiropractic Association and the International Chiropractic Association support individual exemptions to compulsory vaccination laws, and a 1995 survey of U.The Canadian Chiropractic Association supports vaccination; however, surveys in Canada in 2000 and 2002 found that only 40% of chiropractors supported vaccination, and that over a quarter opposed it and advised patients against vaccinating themselves or their children.chiropractors found that about a third believed there was no scientific proof that immunization prevents disease
Edited sentence: Although the Canadian Chiropractic Association supports vaccination, the American Chiropractic Association and International Chiropractic Association support exemptions to compulsory vaccination laws.Chiropractic has historically been opposed to vaccination and most chiropractic writings on vaccination focus on its negative aspects, despite its being one of the most cost-effective forms of disease prevention.Surveys in Canada in 2000 and 2002 found that about 40% of chiropractors supported vaccination, but that over a quarter opposed it and advised patients against vaccinating themselves or their children