Thermo Fisher to buy Qiagen for $10.1 billion

Thermo Fisher is acquiring Qiagen, a company that makes lab equipment and diagnostic tests, for $10.1 billion plus the assumption of $1.4 billion of debt.

Why it matters: This is the largest health care transaction so far in 2020. It's also especially relevant because Qiagen makes a testing kit that detects the new coronavirus strain.