Fortunately, a royal functionary, the magistrate of Loja, Juan Lopez Canizares, gave her the healing bark of a medicinal plant that had saved him from the grip of tertian fever
, that is, malaria.
The Medieval Warm Period was already on the wane when Geoffrey Chaucer (1342-1400) wrote, in the Nun's Priest's Tale, "You are so very choleric of complexion./Beware the mounting sun and all dejection,/Nor get yourself with sudden humours hot;/For if you do, I dare well lay a groat/That you shall have the tertian fever
's pain,/Or some ague that may well be your bane."
To the extent that she has exemplified specific illnesses, notably venereal disease, smallpox, and tertian fevers
, she has arguably minimised these problems.