Potential Disruption from Amazon and Challenges Faced by New Entrants: The passage introduces the potential for disruption from Amazon in the health care sector. Despite setbacks, such as the closure of Haven Healthcare, Amazon continues to expand its health-care business through acquisitions like One Medical and the introduction of services like Amazon Clinic and RxPass. The belief is that Amazon's focus on customer experience and its vast logistics network could potentially reshape the industry. However, challenges faced by newcomers, including difficulty in breaking into top pharmacy chains, underlines the formidable position of established players like Big Health. The passage suggests that despite the powerful entry of Big Tech, the existing giants in the health care industry maintain significant control and influence over the market." create a main topic based off the provided paragraph