The Tranquil Passport exercise, led by HHS's ASPR, tested the U.S. response to a simulated international outbreak of a high-consequence infectious disease. Using the new Portable Biocontainment Unit (PBCU), simulated patients were transported across multiple states to top biocontainment hospitals. Regional treatment centers practiced coordinated care, infection control, and emergency protocols, reinforcing national readiness ahead of global events like the 2026 FIFA World Cup.
