UKHSA's new analysis has looked at the recombinants known as XF, XE, and XD.

UKHSA 的新分析研究了被称为 XF、XE 和 XD 的重组体。

In the UK, 38 cases of XF have been identified, though none have been seen since mid February.

在英国，已经发现了 38 例 XF 病例，尽管自 2 月中旬以来没有出现过。

XF is the recombinant between Delta and BA.1 but only been detected in Britain so far.

XF是Delta和BA.1的重组体，但目前只在英国发现。

Britain's Health Security Agency is monitoring three recombinant lineages: XD, XE and XF.

英国卫生安全局正在监测三个重组谱系：XD、XE 和 XF。

Of these, XD and XF are recombinants of Delta and Omicron BA.1, while XE is a recombinant of Omicron BA.1 and BA.2.

其中，XD 和 XF 是 Delta 和 Omicron BA.1 的重组体，而 XE 是 Omicron BA.1 和 BA.2 的重组体。

So far, only 39 sequences of the XF hybrid variant have been identified and only in Britain.

到目前为止， 只有 39 个 XF 杂交变体的序列已被识别， 并且仅在英国。

The first was registered on January 7, and no samples have been found since February 14. The agency concluded that XF was unlikely to be associated with sustained community growth.

第一个于 1 月 7 日登记， 自 2 月 14 日以来未发现任何样本。 该机构得出结论， XF 不太可能与持续的社区增长有关。