“Law” of Maria de Luna of Aragon [Present-day Spain; Kingdom of Aragon] [Provisional]: “[…] because these perfidious Jews are thirsty for Christian blood, as enemies would be, and it is dangerous for Christians to obtain any medical help from Jewish doctors when they are sick […] we ordain and establish that no Jew, in any case of a Christian’s infirmity, should dare to exercise his office unless a Christians doctor will [also] take part in the cure.” [Researcher’s note: A punishment of imprisonment and a fine of 10 pounds was imposed.]
Soyer, Francois: Antisemitic Conspiracy Theories in the Early Modern Iberian World. (Leiden/Bosten); Researched by Ziba Shadjaani 3/31/2020