Final answer:
The text structure used for "New Knowledge, but No Cure" is cause and effect.
Step-by-step explanation:
The text structure used for "New Knowledge, but No Cure" is cause and effect. In a cause and effect text structure, the writer presents a situation or event, and then explains the reasons (causes) it happened and the impact (effects) it had. In this article, the writer discusses the new knowledge gained in a particular subject, but also highlights the lack of a cure, establishing a cause-effect relationship between the two.