Biotechnology The European Commission (EC) has approved the extension of the current marketing authorization of Solaris (eculizumab) to include the treatment of neuromyelitis optica spectrum disorder (NMOSD) in adult patients who are anti-aquaporin-4 (AQP4) antibody-positive with a relapsing course of the disease, making it the first and only drug cleared for this condition in Europe. 28 August 2019