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Vaccinating dogs is the best way of reducing human deaths from rabies. But at least 70% of them need to be treated to eliminate the disease, which is very time consuming and costly. Now a new app, along with detailed data-driven analysis, has halved the time it takes to vaccinate dogs – as well as significantly reducing costs and the workload for vets. Dr Stella Mazeri, from Edinburgh University in the UK, explains why the data-based approach has been so successful in Malawi. (Image: Stray dogs, Credit: Getty Images.)