A dermatology product from Mexico has led to the first known case of methylmercury poisoning in half a century.
The new treatment, Mavenclad, is recommended for patients who have seen less success with other MS medications.
A rheumatologist summarizes one patient's winding road to diagnosing an autoimmune disease: "It is sometimes more art than science."
An insider's take on the disease: "Don't let the pain rule your life."
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