Original Summary

Some viruses appear to vanish when outbreaks dissipate, only to emerge again. Scientists don’t always know which animals they lurk in — and how to stop them from spilling back over.

  • 情报分类：综合情报
  • 分类依据：内容未命中明确的垂直分类规则，归入综合情报
  • 信息来源：英语新闻 / NYT > Top Stories
  • 发布时间：2026/9/22 17:00:37