Table 1

The dogs’ characteristics, working history and indication behaviours

Dog nameBreedAgeSexAlert response for positive sampleWorking history
SiljaLabrador retriever6FPawingNarcotics
ReleLabrador retriever5MSitsDangerous goods
KostiLabrador retriever8MSitsDangerous goods
E.T.White Shepherd4FNose freeze + one pawCanine cancer
  • E.T. was initially trained to discriminate SARS-CoV-2 infection using urine samples and later, skin swab samples, while the other three were directly trained by skin swabs from patients with COVID-19 in the acute stage of the disease.