“…Moreover, Chiu et al [46] investigated the effectiveness of the fever screening in hospital, obtaining a sensitivity of 75% and specificity of 99.6%. Bardou et al [47] obtained sensitivity of 0.9286, specificity of 0.9967, PPV of 0.8667, and NPV of 0.9984 for feverish subjects detection. Nguyen et al [48] compared the performances of three IRI systems for mass fever screening (i.e., FLIR ThermoVision A20M [FLIR Systems Inc., Boston, MA, USA], OptoTherm Thermoscreen [OptoTherm Thermal Imaging Systems and Infrared Cameras Inc., Sewickley, PA, USA], and Wahl Fever Alert Imager HSI2000S [Wahl Instruments Inc., Asheville, NC, USA]).…”