Czech trainers teach dogs to sniff out Covid

"Good boy!" exclaims Lenka Vlachova, a trainer working at Prague's fire brigade, as jagdterrier Renda sits down by one sample, wagging his tail.

source https://timesofindia.indiatimes.com/world/europe/czech-trainers-teach-dogs-to-sniff-out-covid/articleshow/80430881.cms