Many companies are checking temperatures before employees enter facilities. The federal government and some states recommended the procedure to help businesses reopen. Thermal scanning also is already happening at some airports around the globe, as well as other locations. Travelers should expect to encounter more health screenings of different sorts.

Thermal scanning is supposed to monitor a person's body temperature and identify those with fevers. There are doubts about its effectiveness. Other kinds of health screening, like collecting saliva to determine if a person is currently infected or blood tests to detect antibodies, raise questions related . . .

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