The original article appears credible, and I believe the claim is true. A key reason for this trustworthiness is its citation of the CDC, a reputable government organization, regarding the E. Coli outbreak linked to McDonald's. The fast-food chain has also acknowledged the issue and provided updates on their response, which the article references. Numerous other outlets, like AP News and CBS, are covering the story as well. It’s important to highlight that the source of the E. Coli was not the meat but the onions used on the Quarter Pounders, a detail the CDC confirms. As for the teen who experienced kidney failure, that claim also seems valid, with several news sources in Colorado reporting on her situation.