So, I need to kill off a fairly major character in the next twenty pages (I plan to have her die on page 50). This character's death was only backstory in the second draft, but I decided to show her demise in this third draft.

Problem is, in draft 2, she died of a "tropical fever." In this draft, her cause of death needs to be specific.

She dies in summer 1799 in Barbados. I thought of yellow fever. It fits all my requirements. But it seems like yellow fever always occurred in a wider outbreak and I don't think Barbados had a yellow fever problem at the time. Plus, I don't want to kill a lot of characters who would be exposed to the disease, just her.

Doesn't have to be a tropical disease necessarily, just something prevalent but untreatable and quick. Any suggestions?