According to a team of researchers from the The University of London, people from traditionally urban areas could be genetically better suited to fighting infection.

(The team studied people who carried a specific gene variant known to give resistance to TB and leprosy. They found it was more common in people from areas with a long history of urbanisation, where the diseases were more likely to have been rife at one point. Dr Ian Barnes, said, “This seems to be an elegant example of evolution in action.” Like poetry in motion.)