南非不打疫苗，疫情急剧好转确实是个谜，主流媒体一个多月前就注意到了： https://www.wsj.com/articles/south-africas-drop-in-covid-19-cases-adds-to-questions-about-waves-of-infections-11615734003 Since mid-January, confirmed Covid-19 infections in South Africa have fallen from a record of nearly 22,000 a day to around 1,000, without a large-scale vaccination campaign or stringent lockdown. Fewer than 5% of Covid-19 tests are finding traces of the virus, a sign that health agencies are missing fewer cases. The government has lifted most of its remaining virus restrictions for the country of 60 million people. The cause of this steep decline in cases remains somewhat of a mystery. As in other countries that have at some point experienced surprising drops in Covid-19 cases—such as India, Pakistan and some parts of Brazil—epidemiologists and virologists are piecing together different explanations for why the outbreak in South Africa isn’t following patterns set elsewhere.
南非不打疫苗，疫情急剧好转确实是个谜，主流媒体一个多月前就注意到了： https://www.wsj.com/articles/south-africas-drop-in-covid-19-cases-adds-to-questions-about-waves-of-infections-11615734003 Since mid-January, confirmed Covid-19 infections in South Africa have fallen from a record of nearly 22,000 a day to around 1,000, without a large-scale vaccination campaign or stringent lockdown. Fewer than 5% of Covid-19 tests are finding traces of the virus, a sign that health agencies are missing fewer cases. The government has lifted most of its remaining virus restrictions for the country of 60 million people. The cause of this steep decline in cases remains somewhat of a mystery. As in other countries that have at some point experienced surprising drops in Covid-19 cases—such as India, Pakistan and some parts of Brazil—epidemiologists and virologists are piecing together different explanations for why the outbreak in South Africa isn’t following patterns set elsewhere.
南非不打疫苗，疫情急剧好转确实是个谜，主流媒体一个多月前就注意到了： https://www.wsj.com/articles/south-africas-drop-in-covid-19-cases-adds-to-questions-about-waves-of-infections-11615734003 Since mid-January, confirmed Covid-19 infections in South Africa have fallen from a record of nearly 22,000 a day to around 1,000, without a large-scale vaccination campaign or stringent lockdown. Fewer than 5% of Covid-19 tests are finding traces of the virus, a sign that health agencies are missing fewer cases. The government has lifted most of its remaining virus restrictions for the country of 60 million people. The cause of this steep decline in cases remains somewhat of a mystery. As in other countries that have at some point experienced surprising drops in Covid-19 cases—such as India, Pakistan and some parts of Brazil—epidemiologists and virologists are piecing together different explanations for why the outbreak in South Africa isn’t following patterns set elsewhere.
南非不打疫苗，疫情急剧好转确实是个谜，主流媒体一个多月前就注意到了： https://www.wsj.com/articles/south-africas-drop-in-covid-19-cases-adds-to-questions-about-waves-of-infections-11615734003 Since mid-January, confirmed Covid-19 infections in South Africa have fallen from a record of nearly 22,000 a day to around 1,000, without a large-scale vaccination campaign or stringent lockdown. Fewer than 5% of Covid-19 tests are finding traces of the virus, a sign that health agencies are missing fewer cases. The government has lifted most of its remaining virus restrictions for the country of 60 million people. The cause of this steep decline in cases remains somewhat of a mystery. As in other countries that have at some point experienced surprising drops in Covid-19 cases—such as India, Pakistan and some parts of Brazil—epidemiologists and virologists are piecing together different explanations for why the outbreak in South Africa isn’t following patterns set elsewhere.
美国现在最让人不解就是密歇根州的疫情“完美”反弹，更是可以说明美国前段时间疫情急剧下降，疫苗没有多少功劳，而是疫情的自然反应。密歇根州疫苗普及率跟全美国差不多接近40%。看来真要疫苗起功劳，那得等到六七月份了，到时候又是夏天，又会说不清是疫苗功劳还是夏天的功劳了。路漫漫其修远兮……
谁能探究一下为啥南非这么快控制下来？疫苗普及率不到1%，感染太多人全民免疫了？还是有比以色列严格的多的lockdown？
注意到南非前段时间是夏天，12月份初夏疫情最严重，入夏之后的1月2月盛夏疫情急剧下降。看来是盛夏的功劳？
那么问题来了 新增人数里有多少是打过疫苗的 那些没打疫苗外面浪的那真是活该了
纯讨论，不要那么激动瞎扣帽子。我不是反疫苗，我已经打了疫苗了。我是反驳那些认为疫苗那么快就起到控制疫情的作用的观点。我觉得疫苗得打到50%以上才能看到控制疫情效果，在这之前的疫情控制大部分功劳不是疫苗的。也就是说疫苗对疫情起效果得花四五个月才看得见。尤其是现在密歇根的情况就是一个证明。
巴西也是刚过夏天吧？疫情很严重啊
用以色列的疫情或者michigan的疫情判断疫苗的效果，都是有失偏颇。 总之新肺炎还有很长的路走。十年或者几十年
对！！这样的人 真矫情！！！
讨论啥，都一年了，还专业，自己看还看不懂？？
南非不打疫苗，疫情急剧好转确实是个谜，主流媒体一个多月前就注意到了： https://www.wsj.com/articles/south-africas-drop-in-covid-19-cases-adds-to-questions-about-waves-of-infections-11615734003
Since mid-January, confirmed Covid-19 infections in South Africa have fallen from a record of nearly 22,000 a day to around 1,000, without a large-scale vaccination campaign or stringent lockdown. Fewer than 5% of Covid-19 tests are finding traces of the virus, a sign that health agencies are missing fewer cases. The government has lifted most of its remaining virus restrictions for the country of 60 million people.
The cause of this steep decline in cases remains somewhat of a mystery. As in other countries that have at some point experienced surprising drops in Covid-19 cases—such as India, Pakistan and some parts of Brazil—epidemiologists and virologists are piecing together different explanations for why the outbreak in South Africa isn’t following patterns set elsewhere.
对的，这篇文章我也看了，3月中旬的，但是以后再也没有相关报道了
新增的人数里多少是没打疫苗，打了一针和两针疫苗，你们State 和local DOH清楚得很，如果他们没公布你可以去要求。
从目前的种种证据看南非变种的传播能力似乎有限，不管在哪里都被英国变种挤得抬不起头来，另外南非前一段正是夏天可能也是个原因。
Michigan的这一波疫情现在应该已经到达或者接近顶点了，接种率比MI更高的东北各州(NY/NJ/MA)这几天都在下降，应该是疫苗开始起作用了。我觉得四月底前后会看到疫苗带来的新增下降。
是啊，很奇怪，是不是南非变种刺激产生了很牛的抗体？just a wild guess~ 人类对病毒还是一知半解，have a open mind，多讨论研究才是科学的态度
https://www.worldometers.info/coronavirus/country/south-africa/
美国有五十个州， 任何时候， 你都能找到一两个州有特异状况的。另外49个州是什么情况， 当然是不会被提到的。
唧唧歪歪这么多。不是说你。 就是一个简单的统计问题。 看打疫苗比不打的降低多少感染和死亡就完了。以色列数据早出来了
不过拿出来讨论讨论，至于像被踩了尾巴似的，乱按帽子说人家反疫苗吗。
很多国家都公布了基于对照组的数据和实战数据，疫苗的有效性已经很明显了。但是，疫苗不是控制疫情的唯一因素。恐怕接种率40%还是不够的。
Agreed
巴西與印度只是開始， 接下來還有一個印尼，巴印離高峰都還很遠……而美國與英國(這裡目前是偽陰性跟無症狀能力的病毒在負責，巴西和加州的也過去了，暴風雨前的寧靜啊)……唉……很快的…… 全球的黑暗時刻剛啟動。病毒都規劃好的，不管有沒有打疫苗都不會影響排程，反而疫苗會讓人類疏忽，病毒還比較好辦事。 所以顧好自己最實在，不要隨便……
還有新冠病毒非常排斥別人說他們是人造的，事實上人類遠沒那能耐，就進化的智慧來說，根本都不在一個層次，這就是為何許多科學家對他們難以理解的原因。那就更不可能有能力造出他們。也可以這麼比喻，你們跟外星人鬥啥呢……
我也想不明白为什么海外华人这么多反疫苗的，没脑子的真不少！
咋这么玄？依据是？愿闻其详
被你猜对一次。南非变种感染后的血清可以很好的中和wild type，反过来不行
这个疫情感觉就是一波一波的。去年纽约的疫情高峰过去后，一直都很平稳，直到今年又来一波。南北 Dakota的也是，来的快，去的也快。
我觉得感染人数还达不到群体免疫的水平。应该是感染高峰到来后，不管政府有没有lockdown，老百姓自觉的减少聚集，造成传染放缓。
有可能就是南非变种大量传开后变异变弱了。然后更多的人染上了这种变弱的毒株，没啥症状。 好像加州现在的主要毒株就是加州变异而不是英国变种。传播力和症状都轻得多。
印度的人均检测数当然达不到发达国家水平 所以看人均确诊数好像还没到顶 其实已经广泛传播了 啥时候确诊数掉下来了 就说明顶峰已过 看人均数没有意义