The US has opened an antitrust probe into UnitedHealth, with discussions revolving around the company's practices and the healthcare industry as a whole. The probe's specifics are not detailed in the available comments, but it has sparked a conversation about the industry's efficiency and patient care. The comments touch on the idea that the current system prioritizes profits over patient well-being. The discussion also explores the concept of a single-payer system and its potential effects on healthcare costs and accessibility.