Last month, police departments in Daytona Beach and Connecticut unveiled what was initially touted as a potential new tool against a pandemic: drones capable of taking a person’s temperature from 300 feet in the air.

Both agencies quickly backtracked on using the machines to track the novel coronavirus after backlash from civil liberty groups warning about the implications of a “Big Doctor” in the sky singling out people simply for running a fever, when it might be nothing more than a more common and less deadly flu.

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