Scientists in the UK and The Gambia say they have the first evidence that dogs can sniff out malaria.
They have trained dogs to recognise tell-tale aromas using clothes from people infected with the disease.
It is hoped the animals can be used to stop malaria spreading and eventually help with eradication.
Although the research is still at an early stage, experts say the findings may even lead to new ways of testing for the disease.
Studies have already shown that being infected with the malaria parasite changes our aroma to make us more attractive to the mosquitoes that spread the disease.