Researchers have mapped the spread of infectious diseases in humans across millennia, to reveal how human-animal interactions permanently transformed our health today. A new study suggests that our ancestors’ close cohabitation with domesticated animals and large-scale migrations played a key role in the spread of infectious diseases. The team, led by Professor Eske Willerslev at the Universities of Cambridge and Copenhagen, recovered ancient DNA from 214 known human pathogens in prehistoric hum...