Phase 6, the pandemic phase, is characterized by community level outbreaks in at least one other country in a different WHO region in addition to the criteria defined in Phase 5.

• 第6级，大流行阶段，其特点是除了第5级确定的标准外，在世卫组织一不同区域至少其他一个国家发生了社区层面的暴发。