• Reuters

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Biogen Inc. revived plans on Tuesday to seek U.S. approval for the Alzheimer’s treatment aducanumab and said data from more patients in two discontinued studies showed the drug reduced the decline of patients.

The drugmaker’s shares soared 27 percent in New York trading, recouping almost all of the $18 billion it lost when it said in March it was abandoning the two studies. Shares in Eisai Co., Biogen’s Japanese partner in the drug, were quoted up 18 percent to the daily limit high of ¥6,534 in Tokyo trading.

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