Can thermal scanners at airports and entrances of buildings detect if I have COVID-19? bowhouse 21st July 2020 B Can thermal scanners at airports and entrances of buildings detect if I have COVID-19? No – thermal scanners are good at detecting fever i.e. those people who have a higher temperature than normal body temperature. Fever is one of the symptoms linked to COVID-19 – but there are many other possible causes of fever. Other articles Category: COVID-19 Added on 21st July 2020 Other articles