Return to work during coronavirus disease 2019 (COVID-19): Temperature screening is no panacea

Tear duct measurement is preferred, as it measures temperature from a single artery.3 Thermal imaging cameras provide comparable accuracy to oral temperature readings, but only when routinely calibrated and adjusted to control for individual and environmental factors. For those entering from a cold environment, facial skin must reacclimate to ambient temperature,3 which may contribute to crowding at the entrance. [...]the screening area where thermal imaging cameras are placed must be maintained at relatively consistent ambient temperature and humidity; this may be difficult to achieve in entrances to facilities, particularly in extreme weather conditions. [...]fever is nonspecific for COVID-19, so elevated temperatures captured by screening could be due to other illnesses such as seasonal influenza.