In an attempt to spot those infected with swine flu and other illnesses as they disembark from airplanes, airports are employing thermal imaging cameras more often.
Thermal imaging cameras measure the temperature of items within view of the lens. People with fevers from a strain of the swine flu would stand out from healthy people because of their higher body temperatures.
Irisys of the United Kingdom is one manufacturer of the thermal imaging cameras, and the cameras cost about $3,000. The cameras proved useful in Asian airports during the SARS outbreak in 2002 and 2003.