In the following video, Motley Fool health-care analyst David Williamson takes a look back at Vertex's (VRTX -1.65%) earnings report this quarter. While it was far from a good quarter for the company, things were somewhat better than expected, leading to a sell-off that wasn't nearly as bad as analysts had feared. David tells us why the company struggled this quarter, and what investors can expect from them in the months to come.