Even before Emirates flight EK203 arrived in New York on September 5 carrying dozens of ill passengers, the crisis response was under way. Crew members alerted authorities about the sick travelers from the air. Health officials dispatched an emergency response team with mobile diagnostic equipment to the tarmac to await the plane’s arrival. Ambulances waited nearby. EMTs notified hospitals about a potential influx of severely ill, potentially infectious patients. And after the flight landed, health officials evaluated more than 500 passengers at the airport and transported at least 10 to a local hospital for further testing.