Foto de stock - 19 September 2021, Lower Saxony, Hanover: A sample container with a sweat sample for the corona sniffer dogs is taken from the test station. As part of a feasibility study, trained corona sniffer dogs are used for the first time at a four-part concert series in Hanover. Photo: Michael Matthey/dpa. - Hanover/Lower Saxony/Germany

Imagen: 19 September 2021, Lower Saxony, Hanover: A sample container with a sweat sample for the corona sniffer dogs is taken from the test station.

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