Jessica Wright (University of Sheffield) joins the Infectious Historians team to discuss ancient medicine. The conversation begins with a definition of ancient medicine (and a reflection upon its meaning), as well as considering how ancient practitioners conceived of infectious diseases and infection. The discussion then moves to Christian heresies, which Jessica explains and connects to her own work that shows how certain ancient writers such as Augustine understood these Christian heresies as mental illnesses. At the end, Jessica reflects on the use of mental health related language in the present as a way to discredit one’s (often political/ideological) opponent.