The artificial intelligence in Viral Sign equips client organizations to detect individuals infected with COVID-19, and other influenza-like illnesses (ILI) prior to the onset of fever. Viral Sign represents an important tool to help mitigate virus transmission in high-risk settings.

Viral Sign has been deployed into facilities and worksites in the U.S., South America, Middle East, and Europe. Since March of 2020, over 1,000,000 screens have been conducted using Viral Sign.

The Viral Sign algorithm leverages the power of infrared imaging to produce a comprehensive thermal signature of the face. In real-time, Viral Sign assesses the thermal signature across the regions of interest in the face to identify patterns consistent with early, presymptomatic influenza-like illness (ILI). The total time required for Viral Sign to capture the infrared image, evaluate the thermal signature, and provide a result is approximately three seconds.

Viral Sign does not make a medical diagnosis. A medical diagnosis must be made by a licensed healthcare professional.

Viral Sign Offers the Following


96% accurate with greater sensitivity for the detection of fever and the prefebrile state. Superior to solutions that detect only point temperature (point thermometers) or a single mass temperature (thermal cameras).


Viral Sign eliminates close contact between the evaluator and the individual being screened.


Processing speed (<3 seconds) allows the screening process with Viral Sign to be workflow neutral, enabling individuals to get to the job site or destination quickly.


Visual and audible alerts inform the evaluator when a virus is suspected in an individual. The audible alerts may be turned off when appropriate for the setting.


A comprehensive thermal signature produces a result that identifies where there is high suspicion for the presymptomatic presence of virus.

AI-Driven Results

The artificial intelligence in Viral Sign produces a result (Okay, Evaluate, or Risk) that does not require interpretation by the evaluator. The evaluator is not required to be a medical professional.

Step 1

Individuals are monitored remotely as they pass through the checkpoint for the facility. The set-up at the point of screening includes an infrared camera, a laptop tethered directly to the camera, a camera stand, point of screening floor guides (“Stand Here”), and a 21-inch monitor (to permit those being screened to see their result in real-time).

Step 2

Viral Sign delivers a visible result to communicate the individuals status: Okay, Evaluate, or Risk. An audible alert can be turned on to bring increased awareness to the result where required. The individual monitoring the results is not required to interpret the visual image and is not required to be a medical professional. Interpretation is executed by the artificial intelligence in Viral Sign.

Step 3

Individuals identified as suspicious for the presence of virus, indicated by the Evaluate or Risk result, can be processed consistent with the organization’s protocol for isolation and follow-up.

The screening result with Viral Sign is indicated as “OK” (or low risk), “Evaluate” (medium risk), or “Risk” (high risk). Below, we provide three screen shots illustrating the OK (left), Evaluate (Center), and Risk (Right) result. It is important to note that the facial images are not representative of the full range of images for each risk cohort.