估计中文翻译有问题。以上面CNN 的文章感染率不到1%
现在很多国家在抽血测抗体
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对，我看完改了一下，是百分之一感染率，其中百分之五十是无症状感染者。也就是说很多人被感染过但不知道。
这是很恐怖的事。但这无症状感染者是不是具有很强感染性，这个关键问题缺没有说。
lfe634
灰體輻射
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希望在抗體之前同時感染上兩種病毒，如果先得一種還能得再一種 (看它變異在哪裡吧)，群體免疫就是不能實現了。
我觉得还是要看。中国发生过一个人去过疫区没症状但是身边人没去过武汉的倒一片，一查，她阳性但是无症状。这种就很恐怖。但是更多的是完全潜伏，无症状也不传染。
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如果存在很多携带病毒的人，他们很有可能具有传染性，这是在中国的报告中早就提到了的，但美国的CDC一直到很晚以后才接受这个事实。
是大部分无症状感染有传染性，还是个例有传染。这个区别很大。假设是大部分有传染的话，那中国现在肯定不会解禁。这个传染规模不是靠掩盖数字可以遮地住的。
我猜测应该大部分无症状感染应该没有或有极弱的感染性。
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5 min ago
Two hospitals tested all pregnant patients for coronavirus. Here's what they found
From CNN Health’s Jen Christensen
Most of the pregnant women in New York who tested positive for the novel coronavirus -- one in eight -- were asymptomatic at time of delivery, according to a letter published in the New England Journal of Medicine on Monday.
The research was conducted between March 22 and April 4 at Columbia University Irving Medical Center and the New York-Presbyterian Allen Hospital.
The center put a universal testing policy in place for all women admitted for delivery after the medical centers had two novel coronavirus cases confirmed among their patient population.
Asymptomatic cases suggest universal testing important: Of the 215 pregnant women who delivered at these hospitals, four who tested positive for Covid-19 when they were admitted for delivery had a fever or some other symptoms of the coronavirus.
There were 29 others who tested positive for Covid-19 but did not have fever or any other symptoms of the disease.
The authors argue that this research shows that there are real potential benefits to conducting a universal test on patients.
Knowing if someone is infectious would help the hospital determine where to place the patients so they won’t get other people sick, and would help guide the hospital’s decisions on what personal protective equipment the staff may need.
Two hospitals tested all pregnant patients for coronavirus. Here's what they found
From CNN Health’s Jen Christensen
Most of the pregnant women in New York who tested positive for the novel coronavirus -- one in eight -- were asymptomatic at time of delivery, according to a letter published in the New England Journal of Medicine on Monday.
The research was conducted between March 22 and April 4 at Columbia University Irving Medical Center and the New York-Presbyterian Allen Hospital.
The center put a universal testing policy in place for all women admitted for delivery after the medical centers had two novel coronavirus cases confirmed among their patient population.
Asymptomatic cases suggest universal testing important: Of the 215 pregnant women who delivered at these hospitals, four who tested positive for Covid-19 when they were admitted for delivery had a fever or some other symptoms of the coronavirus.
There were 29 others who tested positive for Covid-19 but did not have fever or any other symptoms of the disease.
The authors argue that this research shows that there are real potential benefits to conducting a universal test on patients.
Knowing if someone is infectious would help the hospital determine where to place the patients so they won’t get other people sick, and would help guide the hospital’s decisions on what personal protective equipment the staff may need.
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中国现在每天也在报道无症状患者的数目，但是不知道这些人是在什么情况下被测试的，有些是输入型， 估计是入关时被普查发现的。至于当地平民是不太可能进行普查的。
你看上面CNN这个报道，医院对215名孕妇进行了普查，竟然测出1/8的阳性。4人有发烧等症状，29人无症状。如果（4+29）/ 215= 15%这可不止1/8了，这是1/6.7.除非这4名有症状的是包含在29人之中的。
you should go checking your antibody. if positive, then you are safe to go around.
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