1. A non-touch thermometer to measure a human vital sign, the non-touch thermometer comprising: a microprocessor; a battery operably coupled to the microprocessor; a single button operably coupled to the microprocessor; a camera operably coupled to the microprocessor and operable to capture at least two images to a memory; wherein the microprocessor includes a pixel-examination-module that is operable to examine pixel values of the at least two images in the memory, a temporal-variation module that is operable to determine temporal variation of the pixel values between the at least two images, a signal processing module that is operable to amplify the temporal variation resulting in amplified temporal variation, and a vital-sign generator that is operably coupled to the signal processing module that generates the human vital sign from the temporal variation; a wireless communication subsystem that is operably coupled to the microprocessor and that is operable to transmit a representation of the human vital sign; and a display device that is operably coupled to the microprocessor that displays the human vital sign, wherein the wireless communication subsystem further comprises a component that is operable to transmit a representation of date and time, operator ID, patient identification and manufacturer, model number and firmware revision of the non-touch thermometer.