The Chelsea Project was a remarkable initiative that brought together experts from various fields to address the COVID-19 pandemic response in the city of Chelsea, Massachusetts. The project unified efforts from a diverse set of stakeholders that included city government departments, community-based organizations, local hospitals, for-profit startups, and nonprofits. By combining expertise from multiple perspectives, decision makers were better informed, and the city was able to organize a coordinated response that engaged directly with the community. We've written extensively about the different aspects of the project (wastewater monitoring, community education, vaccine outreach, and rapid testing), the challenges we faced, our successes, and our learnings that you can read at thechelseaproject.org and interventions.centerofci.org. What made this project truly special was the creation of cross-disciplinary relationships that fostered a culture of collaboration and innovation in the city. The Chelsea Project partners brought unwavering dedication, hard work, and commitment to improving public health in the city. As the main convenor of the project, CCI, is winding down, we want to take this opportunity to extend our sincerest gratitude to all of our partners and the community of Chelsea. Your contributions to this effort will have a lasting impact on the health and well-being of the city, and we are honored to have worked alongside you. The Chelsea Project will always be a shining example of how cross-disciplinary collaborations can lead to transformative change, and we know that the lessons learned from this project will continue to inspire public health initiatives in Chelsea and beyond.