In her defense, she was illiterate and was literally unable to understand the evidence against her. How did they know that she was giving people a disease that

In her defense, she was illiterate and was literally unable to understand the evidence against her. How did they know that she was giving people a disease that she never had? And how did they know that there was no way that they couldn't have caught it from elsewhere? How would you response if a government bureaucrat showed up and told YOU that you can't be allowed work because you have a unique condition never before seen by science? Would you simply believe them?