Thermo Fisher Scientific has acquired clinical research services provider PPD for $17.4 billion.   PPD provides a broad range of clinical research and laboratory services to enable customers to accelerate innovation and increase drug development productivity. A leader in the growing $50 billion clinical research services industry, PPD has more than 26,000 colleagues operating in nearly 50 countries. In 2020, the company generated revenue of $4.7 billion. Upon close of the transaction, PPD will...