In 1874, Dr. Arthur Boettcher discovered a small curved bacterium in ulcers. In the 1940’s, Mt. Sinai Hospital in New York taught residents to treat ulcers with antibiotics, after doctors observed antibiotics cured the ulcers, even though they did not know the pathogen. In the 1950’s, knowledge ulcers were caused by an infection was deleted from medical texts and medical training. Doctors were taught ulcers were caused by stress, and patients were left to suffer indefinitely from a curable disease. In 1990, a National Enquirer article informed the public of Dr. Marshall’s 1982 discovery that a small spiral bacterium, H-pylori, caused ulcers. Thereafter, the public demanded medicine accept ulcers were caused by infection. Sometimes false assumptions die slowly in medicine, and change has to be demanded by the public.