Q: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Context : In 1918 tragedy struck, when both Rose Cleveland and Nelly Erichsen were carried off by the 1918 flu pandemic which decimated the post-war World.
Answer : 1918 flu pandemic
A:
What diseased did Nelly Erichsen struggle with?