Restrictions have recently tightened further because of new variants.

由于病毒出现了新的变体，限制最近进一步收紧。

They've released almost 700 new plant variations since 1927.

自1927以来，他们已经发布了近七百个新的植物变体。

A US scientist says vaccinations and precautions can help stop the rise of new COVID-19 cases driven by new variants.

一名美科示，接种疫苗和预防措施可以帮助阻止新冠肺炎新变体病例的增长。

COVID-19 hospital admission and death rates are going up, and new omicron variants are being blamed.

新冠肺炎的入院率和死亡率都在上升，新的奥密戎变体被认为是始作俑者。

There is growing concern in the U. S. over a spike in COVID-19 infections tied to a new Omicron variant.

在美，们对与新奥密戎变体有关的新冠病毒感染病例激增关注加大。

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。

Russia says it's started developing a new version of the Sputnik vaccine adapted to the new COVID-19 Omicron variant.

俄罗斯示，已开始开发一种适应新冠病毒新变体 Omicron 的新版 Sputnik 疫苗。

The World Health Organization is seeking a global treaty between nations on responding to pandemics amid growing concerns over the new COVID-19 Omicron.

在们对新冠病毒的新变体 Omicron 越来越关注的情况下，世界卫生组织正在寻求在各之间达成一项应对疫情的全球条约。

The WHO chief was speaking at the start of a three-day special session of the World Health Assembly on Monday amid growing concerns over the new Omicron coronavirus variant.

世卫组织负责在周一举行的为期三天的世界卫生大会特别会议开始时发讲话，当时们对新变体 Omicron 的担忧越来越大。

Just 15% of people in the U.S. ages 5 and older have gotten a bivalent booster, according to the CDC, which means many people are currently not as protected as they could be against the new variant.

根据美疾病控制与预防中心的数据，在美5岁及以上的群中，只有15%的接种了二价疫苗，这意味着许多目前对这种新变体的保护程度没有达到应有的水平。

New variants or strains of COVID-19 are appearing around the world, as it mutates like other viruses do and one big question being asked is, will existing vaccines protect people against the new versions of coronavirus?

全球范围内正在不断出现新冠病毒的新变体或毒株，当它像其他病毒一样变异时，一个很严重的问题是，现有的疫苗能否保护们免受新冠病毒的变种毒株的感染呢？

Today, we'll look at how new Omicron subvariants are already increasing cases and hospitalizations… Fischman: And we'll try to figure out if fall vaccine boosters should contain standard Omicron or some of those new subvariants instead.

今天，我们将看看新的 Omicron 亚变体如何增加病例和住院率… … Fischman：我们将尝试弄清楚秋季疫苗助推器是否应该包含标准 Omicron 或其中一些新的亚变体。