Original sentence: In the one of these cases, a 2006 petitioner successfully claimed that a hepatitis B vaccine caused her multiple sclerosis despite several studies showing that the vaccine neither causes nor worsens the disease, and despite a conclusion by the Institute of Medicine that evidence favors rejection of a causal relationship.Other rulings have allowed petitioners to gain awards for claims that the MMR vaccine causes fibromyalgia,  that the Hib vaccine causes transverse myelitis, and that the hepatitis B vaccine causes Guillain–Barré syndrome,   chronic demyelinating polyneuropathy,  and multiple sclerosis.This ruling granted an award where where the petitioner claimed that tetanus vaccine caused a particular case of optic neuritis
Edited sentence: In the most extreme of these cases, a 2006 petitioner successfully claimed that a hepatitis B vaccine caused her multiple sclerosis despite several studies showing that the vaccine neither causes nor worsens the disease, and despite a conclusion by the Institute of Medicine that evidence favors rejection of a causal relationship.Other rulings have allowed petitioners to gain awards for claims that the MMR vaccine causes fibromyalgia, that the Hib vaccine causes transverse myelitis, and that the hepatitis B vaccine causes Guillain–Barré syndrome, chronic demyelinating polyneuropathy, and multiple sclerosis.This ruling granted an award even when there was no evidence to support a claim that tetanus vaccine caused a particular case of optic neuritis