Final answer:
The reference text provided does not specify the date when patients were moved to the new WAMC building but discusses a historical event on December 2, 1917, during World War I.
Step-by-step explanation:
The question "When were patients moved to the new WAMC building?" appears to be a historical inquiry; however, the provided reference does not include specific information regarding the movement of patients to a new WAMC building. Instead, the reference depicts a historical situation dated December 2, 1917, describing the condition of patients and the immense workload at a medical facility during World War I, following the battle of Cambrai. Without the context of what WAMC refers to or relevant historical data to answer the question accurately, we are unable to determine when patients were specifically moved to the new WAMC building.