How accurate is thermal scanning? | Ghanti Bajao (19.05.2020)

Thermal Scanner has proved to be quite useful in the identification and prevention of Coronavirus.  It is a tool through which a person suffering from coronavirus or any other similar disease can be identified.  The most important thing about a thermal scanner is that the waves emanating from it do not have any side effects on the human body. But how accurate is the process of thermal scanning? Or is there a possibility of a loophole and wrong results?