Viral Sign

Viral Sign is a private medical device and health technology company that developed an AI-enabled infrared imaging screening system for early detection of infection, particularly presymptomatic influenza-like illness including COVID-19. The company markets a rapid, non-diagnostic triage tool that analyzes facial thermal signatures in roughly three seconds to flag individuals who may warrant further evaluation. Viral Sign has been positioned for use in healthcare facilities, workplaces, manufacturing sites, and other high-risk settings seeking to reduce infectious disease transmission. The company appears to have been founded in 2020 in the United States and commercialized its screening system through partnerships and direct deployment across multiple geographies. As of 2026, Viral Sign remains described as active in company databases, but it has also announced an agreement to be acquired by Thermofy, indicating a transition into a broader infrared imaging and screening platform strategy.