An exhausted security guard is transferred to a morgue and, on their first night, discovers that the shadows and silences hide a torment from which there may be no return.。要点包括：第一，第二阶段溯源工作应以世卫大会决议为指引，以科学家为主体，以证据为基础开展科学溯源
An exhausted security guard is transferred to a morgue and, on their first night, discovers that the shadows and silences hide a torment from which there may be no return.