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Those fever scanners that everyone is using to fight covid can be wildly inaccurate, researchers find Drew Harwell © Ahn Young-Joon/AP A thermal scanner shows the estimated body temperatures of travelers in Seoul. Temperature-scanning devices that check for fevers in schools, workplaces and public venues across the United States distort the results in a way that could overlook the telltale sign of a coronavirus infection, according to new research that casts doubt on the systems’ effectiveness in helping people resume normal life. The thermal cameras and “temperature tablet” kiosks have been heralded as a critical first line of defense against new pandemic outbreaks. But in a new study of the scanners by the surveillance research organization IPVM, researchers warn that the tools are dangerously ineffective, raising the risk that infected people could be waved through medical screening checkpoints and go on to spread the virus unchecked.

Soult ukpyolsiSouth koreaUnited statesPeter plassmannJasmine neisserTim goodwinLarry reedConor healyCenters for diseaseRadiological healthWashington postDrug administrationOffice of device evaluationCertify globalDisease controlDevice evaluation