美国有线新闻 CNN 部分国家考虑发放"免疫护照" 世卫组织发出警告

We start off the week with a bit of a follow up to a story we covered last week about possible herd¹ immunity² in Sweden. When there's no vaccine³ for a disease like coronavirus, herd immunity can occur when enough people have gotten it, recovered from it and are then immune to it. A Swedish disease expert said there are signs of herd immunity appearing around the capital Stockholm. But one of the challenges of the new coronavirus is that it's still mysterious.

本周先来跟进我们上周报道的瑞典可能存在的群体免疫现象。像冠状病毒这种疾病，在没有疫苗时，如果有足够的人感染、康复并产生免疫，那就会出现群体免疫。一名瑞典疾病专家表示，首都斯德哥尔摩附近出现了群体免疫的迹象。但新冠病毒带来的其中一个挑战是，这种疾病仍是个谜。

There's a lot that researchers don't know about it. And the World Health Organization, which is part of the United Nations, says just because people have recovered from COVID-19 does not mean they're immune to it. Some governments around the world are considering giving out "immunity passports" to people who've recovered from coronavirus. This would let them continue with normal life without as many restrictions⁴ as other people might have. But the World Health Organization says that's not a good idea because it doesn't have proof that surviving COVID-19 means people are safe from getting it again.

对于这种疾病，科学家还有很多不了解的地方。联合国下属机构世界卫生组织表示，从新冠肺炎中恢复并不意味着人们就对该疾病免疫。一些国家考虑向冠状病毒康复者发放“免疫护照”。这可以让他们继续正常生活，不用像其他人那样面临诸多限制。但世卫组织表示，这并不是个好主意，因为没有证据表明新冠肺炎幸存者能免于二次感染。

Is it possible that they are? Yes. But researchers don't know if the antibodies people may have give complete or just partial protection from coronavirus. And they don't know how long those antibodies will stick around in someone's system. These are the reasons why many health officials are telling people to continue keeping their distance from others even if they've had coronavirus and made a full recovery.

有这种可能吗？有。但研究人员尚不清楚人体内可能存在的抗体能否给予人体全面或部分保护，防止感染冠状病毒。他们也不清楚这些抗体会在人体免疫系统中存在多长时间。这就是许多卫生官员告诫民众继续与他人保持距离的原因，即使他们曾感染冠状病毒但现在已经痊愈。

1 herd   

n.兽群，牧群；vt.使集中，把…赶在一起

参考例句：

• She drove the herd of cattle through the wilderness.她赶着牛群穿过荒野。
• He had no opinions of his own but simply follow the herd.他从无主见，只是人云亦云。

2 immunity   

n.优惠；免除；豁免，豁免权

参考例句：

• The law gives public schools immunity from taxation.法律免除公立学校的纳税义务。
• He claims diplomatic immunity to avoid being arrested.他要求外交豁免以便避免被捕。

3 vaccine   

n.牛痘苗，疫苗；adj.牛痘的，疫苗的

参考例句：

• The polio vaccine has saved millions of lives.脊髓灰质炎疫苗挽救了数以百万计的生命。
• She takes a vaccine against influenza every fall.她每年秋季接种流感疫苗。

4 restrictions   

约束( restriction的名词复数 )； 管制； 制约因素； 带限制性的条件（或规则）

参考例句：

• I found the restrictions irksome. 我对那些限制感到很烦。
• a snaggle of restrictions 杂乱无章的种种限制