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.

根据国疾病控制与预防中心的数据，在国5岁及以上的人群中，只有15%的人接种了二疫苗，这意味着许多人目前对这种新变体的保护程度没有达到应有的水平。

In the early 2000s, vaccines known as bivalent oral vaccines were developed to target only PV1 and PV3 because of the drop in circulation of the PV2 strain.

在 21 世纪初，由于 PV2 毒株的传播减少，开发了仅针对 PV1 和 PV3 的二口服疫苗。

The autumn Covid-19 booster shots we have just been offered are one such example – these bivalent vaccines target the original strain of Sars-CoV-2 (the virus that causes Covid-19) alongside the Omicron variant.

我们刚刚获得的秋季新冠加强疫苗就是这样一个例子——这些双疫苗针对的是 Sars-CoV-2 的原始毒株（导致新冠的病毒）和奥密克戎变种。

The new bivalent booster protects you against both the original SARS-CoV-2 strain and Omicron's BA. 4 and BA. 5 subvariants, and it's likely to provide some protection against the newer variants too.

新的二加强针能防护新冠原始毒株和奥密克戎 BQ. 4 和 BQ. 5 的亚变异株，而对于更新的变异，它也可能提供某些防护。

The paired and replicated chromosomes are called bivalents or tetrads, which have two chromosomes and four chromatids, with one chromosome coming from each parent.

配对和复制的染色体被称为二体（也称为四分体），它们有两条染色体和四个染色单体，每个亲本都有一条染色体。

Monovalent and bivalent OPVs respectively contain one or two types of attenuated poliovirus, reducing the number of strains that could possibly mutate.

一和二口服脊髓灰质炎疫苗分别含有一种或两种减毒脊髓灰质炎病毒，减少了可能发生突变的毒株数量。

Health officials in Britain and other European countries also offered " bivalent" shots to target different versions of the virus.

英国和其他欧洲国家的卫生官员也提供了针对不同版本病毒的二疫苗。

The new shots are called " bivalent."

这些新疫苗被称为二疫苗。

The paired chromosomes are called bivalent or tetrad chromosomes.

成对的染色体称为二体（也称为四分体）。

Bivalent vaccines have advantages over the original vaccines as they both top up and broaden our immunity.

二疫苗比原始疫苗有优势，因为它们都能增强和扩大我们的免疫力。

However, the homologous chromosomes of each bivalent remain tightly bound at chiasmata, the regions where crossing-over occurred.

然而，每个二体的同源染色体仍然紧密结合在交叉部位，也就是发生交叉的区域。

So you can go, okay, bivalent means with two things, okay, got it.

所以你可以知道，二就是指有两个东西，明白了。

The administration, they've had to borrow, beg and steal money from different programmes to actually be able to purchase the new bivalent boosters from Pfizer and Moderna.

政府不得不从不同的项目中借钱、乞求甚至挪用资金，才能购买辉瑞和莫德纳的新二加强针。

I plan to get my updated BA.4-5 bivalent at the end of September, the first week in October.

我计划在 9 月底，即 10 月的第一个星期，获得我更新的 BA.4-5 双。

This is because the federal government has purchased nearly two billion doses of COVID vaccines and 171 million bivalent boosters—the ones formulated to cover Omicron strains.

这是因为联邦政府已经购买了近 20 亿剂 COVID 疫苗和 1.71 亿剂二加强剂——这些疫苗是为覆盖 Omicron 毒株而配制的。

So right now, if you're asking a clear question, of today, with the bivalent BA.4-5 boosters or updated vaccines is a better terminology to use, they are available now throughout the country.

所以现在，如果你问的是一个明确的问题，今天，二 BA.4-5 加强剂或更新疫苗是一个更好用的术语，它们现在在全国都有售。

So it'll tell you today's word is bivalent, and it'll explain it, and just that's the word of the day.

所以它会告诉你今天的每日词汇是“双的” ， 并会解释它的意思，仅此而已。

I know we have the bivalent available now.

我知道我们现在有二的。

So if I got my last shot, let's say in July -- August, September, two months later, you should get the bivalent.

因此，如果我最后一次注射疫苗，比如说在 7 月、8 月、9 月，两个月后，你应该注射二疫苗。