UCB sets sights on rare diseases giant Alexion with Ra Pharma acquisitionUCB is to buy US biotech Ra Pharma in a deal worth around $2.1 billion, adding a late-stage Share XUCB sets sights on rare diseases giant Alexion with Ra Pharma acquisitionhttps://pharmaphorum.com/news/ucb-takes-on-rare-diseases-giant-alexion-with-ra-pharma-acquisition/