Top health-care stocks:
Health-care shares were mainly unchanged in pre-market trade on Thursday.
In health-care stocks news, Alexion Pharmaceuticals ( ALXN ) said new secondary efficacy endpoint data on its Soliris treatment for refractory generalized myasthenia gravis show patient improvement at week 26.
Shares in the company were 1.0% higher at $122.28 pre-bell. The stock has traded between $110.56 and $208.88 over the past 52 weeks.
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