They're formulated to help people fight off a relatively recent Omicron subvariant called XBB.1.5.

配制这些疫苗是为了帮助人们对抗一种相对较新的名为XBB.1.5的奥密克戎亚型病毒。

Although no completely new variants of the COVID virus have emerged yet, there are several new Omicron subvariants.

尽管目前还没有出现新冠病毒的全新变异，但现在还存在奥密克戎几种新亚变异。

Today, we'll look at how new Omicron subvariants are already increasing cases and hospitalizations…

今天，我们要看看奥密克戎新的亚变种已经令新冠病例数和重症数上升。

XBB could cause diarrhea, but it is not any worse than other Omicron subvariants.

XBB 可能导致腹泻，但它并不比其他奥密克戎亚型严重。

Well, possibly, unless vaccine makers can develop new booster shots that target Omicron's subvariants.

有可能，除非疫苗制造商能研发出针对奥密克戎亚株的新加强针。

But it comes amid an uptick in coronavirus cases nationwide, mostly due to the highly transmissible Omicron subvariant.

但这是在全国冠状病毒病例上升的背景下发生的，主要是由于高度传染性的奥密克戎亚变体。

Do we know if these subvariants are causing more severe disease?

我们是否知道这些亚株会引发大量重症？

This time, it's driven by the Omicron subvariants BA. 5 and BA. 4.

这次的罪魁祸首是奥密克戎亚变种 BA. 5 和 BA. 4。

The Omicron subvariant makes up nearly three-quarters of new COVID-19 infections in the United States.

奥密克戎的 BA.2 亚型占美国新冠病毒感染的近四分之三。

And its booster dose showed a good neutralization effect against Omicron subvariants in clinical trials.

在临床试验中，其加强针对奥密克戎亚型表现出良好的中和作用。

Now, the subvariants are already dominant in some other countries.

现在这两种亚株已经成为一些别国的主导毒株。

The dominant subvariants in China remain the BA.5.2 and BF.7, according to the statistics in December 2022.

根据 2022 年 12 月的统计数据，中国占主导地位的亚型仍然是 BA.5.2 和 BF.7。

The FDA wanted boosters that are more likely to produce antibodies that neutralize the subvariants.

FDA 想要加强针更可能产生抗体来中和这些亚变种。

XBB has two subvariants, XBB.1 and XBB.1.5, which have been rapidly spreading in Europe and the United States.

XBB 有两个变种，XBB.1 和 XBB.1.5，它们已经在欧洲和美国迅速传播。

Today, we're going to discuss the new alphabet soup of variants and subvariants likely to be around this winter…

今天，我们要讨论今年冬天可能会活跃的新变异株和亚变异株的一大堆缩写。

Possibly, unle-ss vaccine makers can develop new booster shots that target Omicron's subvariants.

刘易斯：有可能，除非疫苗制造商能够开发出针对 Omicron 亚变体的新加强针。

Though the XBB.1.5 has become the dominant sublineage in some countries, the symptoms it caused are no severer than other Omicron subvariants.

尽管 XBB.1.5 已经成为一些国家的主要传播的亚种，但它引起的症状并不比其他奥密克戎亚型严重。

The subvariants are just different enough from their ancestor to evade an Omicron-prompted immune response.

亚变种与其祖先之间存在足够多的差异，以至于能条例奥密克戎引起的免疫应答。

Fischman: The FDA wanted boosters that are more likely to produce antibodies that neutralize the subvariants.

Fischman：FDA希望加强剂更有可能产生中和亚变异体的抗体。

The White House Covid 19 coordinator said the BAa5 subvariant makes up 78 percent of all infections in the United States right now.

白宫的新冠协调员表示，BAa5亚型占美国目前所有感染病例的78%。