Dogs can sniff out SARS-CoV-2 in urine samples with 96% accuracy, according to a proof-of-concept study.

No more swabs being jammed up your nose? Not quite, as the “dog test” is a long way off from practical applications. That’s because the dogs could only distinguish between positive and negative results in samples that they had trained with; they failed to detect SARS-CoV-2 when presented with completely new samples.