"By Fiammetta Rocco Malaria is one of the world's most deadly diseases.
There was no cure until the discovery in Peru of a remarkable tree and its bitter tasting bark.
Hilary Neville reads an account of quinine's transformation of medicine and the history of Empire.
In the first of five extracts, we hear a remarkable first-hand account of how the efforts to elect a new Pope in high summer led to cardinals dropping dead and scenes lacking in all dignity.
It was clear to the Jesuits that something had to be done.