A bit of medical advice: Stay away from medieval squirrels. That’s what a study in Current Biology seems to suggest, anyway, after showing that red squirrels hosted strains of the leprosy bacteria Mycobacterium leprae in England’s Middle Ages.
“In the wake of COVID-19, animal hosts are now becoming a focus of attention for understanding disease appearance and persistence,” Inskip said in a statement. “Our research shows that there is a long history of zoonotic diseases, and they have had and continue to have a big impact on us.”