Given a statement, generate a question such that the answer is contained in that statement.

[EX Q]: Strepl infections are not caused by a virus
[EX A]: What is the cause of strepl infections?

[EX Q]: arthropods can spread disease and destroy crops
[EX A]: What can spread disease and destroy crops?

[EX Q]: Smallpox is not affected by medicines.
[EX A]:
What does smallpox not have to be affected by?