Close up of a laboratory experiment showing a cloud of mosquitoes buzzing around 2 square plates. Buzzing of the insects is heard throughout. The plate on the right is labeled: Human body-temperature (98.6 degrees Fahrenheit).
Text on-screen reads: "Normal mosquitoes head to the plate that is human temperature." The mosquitoes are shown congregating on and around the human temperature plate.
"Mosquitoes without an IR21 receptor fly around. they have a hard time detecting human temperature." Mosquitoes are now shown in the same setting, buzzing around indiscriminately.
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