They suspected that exposure occurred in the seals before they reached land, either while at sea or upon entering the near-shore environment.

  • 海象身上都有标记并被卫星跟踪,在海中不太可能与人直接接触。研究人员因此推测,海象接触到甲流病毒或许在上岸前。

  • 互联网摘选 2025-01-20 19:03:46

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