Is Vertex Pharmaceuticals a monopoly?

Could you please elaborate on whether Vertex Pharmaceuticals holds a monopoly position in its industry? Are there any competitors offering similar products or services that could potentially challenge its dominance? How does the company's market share compare to its competitors, and what strategies does it employ to maintain its leading position? Furthermore, are there any regulatory barriers or intellectual property protections in place that could reinforce its monopoly status, or are there any potential threats to its market position that we should be aware of?