The police in some countries are testing, buying or already using high-tech chinese helmets that can measure other people's temperature so they can pick out people that have a fever.
That doesn't sound very effective since many people can be symptom-free with no fever and still be spreading the COVID-19 virus.
https://activistmommy.com/police-ar...9-fevers/?mc_cid=6702977f20&mc_eid=8c542f480d
FIFY.
Always wanted to use that.