Dogs are being trained to sniff out COVID-19, and they're better than the tests

There are currently four COVID-19 sniffing dogs at the airport in Helsinki, Finland — part of a state-funded project to screen new arrivals who might be carrying the novel coronavirus.

As The Guardian explains:

The canines were not sniffing the virus itself but rather tell-tale volatile chemicals produced when the virus infects cells, and released by the body.

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