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The case was reported in the NEJM...
"PML in a Patient without Severe Lymphocytopenia Receiving Dimethyl Fumarate"
http://www.nejm.org/doi/full/10.1056/NEJMc1413724
Unfortunately and tragically for this person, MS meds carry risk. Tecfidera benefits many MSers but diligence in monitoring lymphocyte counts is a must with this medicine.
"PML in a Patient without Severe Lymphocytopenia Receiving Dimethyl Fumarate"
http://www.nejm.org/doi/full/10.1056/NEJMc1413724
Unfortunately and tragically for this person, MS meds carry risk. Tecfidera benefits many MSers but diligence in monitoring lymphocyte counts is a must with this medicine.