Automatic Temperature Scanning 2

Here is a design to find fever in streams of people entering a workplace, school or public building

This can be done by hand but I want to make it cheaper

Ultrasonic detector tells someone is in front of it. (MLX90614)
Gets them to the right distance with a display (not shown)
Mirrored picture in an antiviral metal helps the person line themselves up in front of the IR sensor.
Flashes red if they are above 37.5C