The war room served as a virtual collaborative space where cross-functional teams came together to tackle the vaccination app's complexities. Through continuous Zoom meetings, team members from design, engineering, marketing, and product management worked closely, brainstorming, gathering data, and making decisions in real-time. The war room facilitated rapid ideation, user feedback sessions, and consultations with technical experts, enabling an agile and empathetic design process. Its dynamic nature ensured challenges were addressed promptly, resulting in a successful and impactful vaccination app.