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U.S. laboratory equipment maker Thermo Fisher Scientific Inc. agreed to buy Qiagen NV, a Dutch maker of tests for diseases including cancer and the new coronavirus, for about 9 billion euros ($10 billion) in the biggest health-care acquisition so far this year.

Investors will get 39 euros in cash for every Qiagen share, Thermo Fisher said Tuesday. That’s 23% higher than Monday’s closing price. Qiagen also sells products for food and forensic testing. Bloomberg earlier reported the companies were nearing a deal after reviving discussions that broke off late last year.