As further information becomes available, WHO may decide to either revert to phase 3 or raise the level of alert to another phase.

当获得更多的信息之后，世卫组织可能决定将警戒级别恢复到第3级或提高到另一阶段。

youdao

I have therefore decided to raise the level of influenza pandemic alert from phase 5 to phase 6.

因此，我决定把流感大流行警戒级别从5级升为6级。

youdao

The WHO was convening an expert panel to consider whether to raise the pandemic alert level or issue travel advisories.

世卫组织正在召开一个专家小组，以考虑是否提高流行病警戒级别或问题旅行忠告。

youdao

Britain also updated its travel warning, though it did not raise its alert level.

BBC: Indonesia braces for tourism blow

The appearance of the exploit on websites has led security firms to raise the level of alert, with Secunia describing the hole as extremely critical.

BBC: Hand on computer mouse