Novartis' ($NVS) Sandoz unit was the first to get a biosimilar approved in the U.S. with Zarxio, its copy of Amgen's ($AMGN) Neupogen, setting off what will be a significant development for the U.S. market as more copies of expensive biologics test the market. Many companies have built facilities with biosimilars in mind. But there were other significant events in 2015, huge M&A deals, and the ongoing uproar from consumers, payers, physicians and lawmakers over how drugmakers have been testing the limits drug pricing. Read about all of the most important developments of the year in FiercePharma. Report