ADVANCE FOR USE SUNDAY, MAY 11 AND THEREAFTER - In this April 9, 2014 photo, multiple sclerosis patient Harold Johnson, 43, is seen this home in Swansea, Ill. Johnson has benefited from the experimental drug Lemtrada that has kept his symptoms at bay since 2009. He and wife, Jessica, are able to go for walks and enjoy life more because his symptoms have diminished. (AP Photo/Belleville News-Democrat, Maureen Houston)
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