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The Johns Hopkins University COVID-19 tracker
estimates that over 16 million people worldwide have been infected with the coronavirus that causes COVID-19.
It also estimates that nearly 650,000 people have died from the disease, but millions have recovered.
So, a question many people around the world are asking is ― can you get it again?
In fact, that was among the most-searched questions on Google's website for many weeks in May and June.
Whether or not you can catch COVID-19 again after getting infected once is connected to your body's immune system.
Does infection strengthen the body's natural defenses as it does with other pathogens?
And if there is an immunity, how long does it last?
Right now, there are no clear answers to these questions.
The U.S. Centers for Disease Control and Prevention and other groups
say they do not yet know how the immune system reacts to COVID-19 or SARS-CoV-2 ― the virus that causes the disease.
This includes how long the body stays immune to infection from the virus.
约翰霍普金斯大学新冠肺炎追踪器估计,
全球有超过1600万人感染引发新冠肺炎的冠状病毒。
它还估计近65万人死于新冠肺炎,不过也有数百万人康复。
因此,全世界许多人都在问的一个问题是:人们会再次感染新冠肺炎吗?
事实上,这是5月至6月的数个星期里,谷歌网站上搜索量最多的问题之一。
是否会再次感染新冠肺炎与人体免疫系统有关。
新冠肺炎感染会像其他病原体一样增强人体的自然防御吗?
如果存在免疫,那能维持多久?
目前,这些问题尚没有明确答案。
美国疾病控制与预防中心(简称CDC)以及其他组织表示,
他们尚不清楚免疫系统会对新冠肺炎或引发新冠肺炎的SARS-CoV-2病毒产生何种反应。
这包括人体对该病毒保持免疫的时间。
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