Figure 2.

Summary of how air travelers were traced during a contact investigation of the first two confirmed cases of Middle East Respiratory Syndrome Coronavirus infection in the United States, 2014

^aLocation of passenger at initial contact

^bOne person was determined to be outside of the Centers for Disease Control and Prevention's jurisdiction.

^cForeign notification: notification sent to public health authorities in other countries, not directly to passengers

^dContacted: passengers who were contacted by U.S. public health officials

^eLocation of air crew was unknown, but they were contacted by their domestic airline of employment.