Final answer:
The question pertains to changes in the medical field's understanding of a condition's etiology, highlighting the evolution of medical knowledge based on new evidence and research.
Step-by-step explanation:
The question relates to the historical accuracy of medical experts' understanding of a particular disease or condition. Since it mentions that the majority of medical experts were wrong about the cause until recently, it implies that a new discovery or further research has shifted the consensus on the etiology of the condition in question. Such shifts in medical understanding are not uncommon as the field of medicine continuously evolves with new research and evidence. Examples of past misconceptions include the misattribution of ulcers purely to stress and lifestyle, whereas we now understand the bacterium Helicobacter pylori plays a significant role in many cases. The context of this question is likely centered around a specific medical condition or general medical knowledge that has undergone significant revision.