Final answer:
The character Freddie in the novel 'Refugee' by Alan Gratz does not have a disease, which may imply a mix-up with another character or book.
Step-by-step explanation:
In the novel Refugee by Alan Gratz, the character named Freddie is not associated with having a specific disease. However, if you are referring to a different Freddie in a different context within the subject of literature, please provide more details so that an accurate answer can be given. Refugee is a historical fiction novel that follows the stories of three different refugees from different periods of time. Since the character Freddie does not have a prominent disease-related storyline in this novel, it's possible there might be a mix-up with another character or book.