看来疫情不会轻易结束了。准备长期抗战吧

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Creekrhino
楼主 (北美华人网)
巴西现在可是夏天。感染过的人相当于打了灭活疫苗。
NY Time - Virus Variant in Brazil Infected Many Who Had Already Recovered From Covid-19
Dr. Faria and his colleagues looked for coronavirus antibodies in samples from a Manaus blood bank in June and October. They determined that roughly three-quarters of the residents of Manaus had been infected.
But near the end of 2020, new cases began surging again. “There were actually far more cases than in the previous peak of cases, which had been in late April,” Dr. Faria said. “And that was very puzzling to us.” https://www.google.com/amp/s/www.nytimes.com/2021/03/01/health/covid-19-coronavirus-brazil-variant.amp.html


l
little_racoon
自然感染造成的免疫反应比灭活疫苗可是强太多了,灭活疫苗和重组蛋白疫苗不能让抗原进入细胞,所以T细胞免疫是短板。按照最近发表的结果,自然感染相当于一针有效性在80%-90%的疫苗吧。 不过现在批准的三个疫苗都用了S-2p修改,抗原结构更稳定,生成抗体的种类更多,目前看起来对抗突变的能力是高于自然感染的。
铁甲依然在
自然感染造成的免疫反应比灭活疫苗可是强太多了,灭活疫苗和重组蛋白疫苗不能让抗原进入细胞,所以T细胞免疫是短板。按照最近发表的结果,自然感染相当于一针有效性在80%-90%的疫苗吧。 不过现在批准的三个疫苗都用了S-2p修改,抗原结构更稳定,生成抗体的种类更多,目前看起来对抗突变的能力是高于自然感染的。
little_racoon 发表于 2021-03-03 08:21

目前批准的疫苗中,一针有效性都达不到80-90%吧,是不是也不如自然的感染?
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jasonlong
如果巴西全民打了辉瑞或者其他MRNA疫苗还这个死相再发这种fear mongering 贴子 人家正经普及辉瑞等MRNA疫苗的以色列英国美国好转的数据放在那儿你不看么 何况人家英国以色列之前也是变种大流行 归根到底是巴西防疫太差一不lockdown 总统川疯子第二 再加没西方先进的MRNA疫苗 最后叠加巴西变种形成的完美风暴 基本上能掉链子的全掉了 从防疫到疫苗没有一个环节作对的,所以 totally不具有代表性 另外巴西变种变异程度还不如南非变种 现在南非变种boost已经实验了 可以handle住,所以对付巴西变种疫苗肯定会有。
m
mindstorm
巴西现在可是夏天。感染过的人相当于打了灭活疫苗。
NY Time - Virus Variant in Brazil Infected Many Who Had Already Recovered From Covid-19
Dr. Faria and his colleagues looked for coronavirus antibodies in samples from a Manaus blood bank in June and October. They determined that roughly three-quarters of the residents of Manaus had been infected.
But near the end of 2020, new cases began surging again. “There were actually far more cases than in the previous peak of cases, which had been in late April,” Dr. Faria said. “And that was very puzzling to us.” https://www.google.com/amp/s/www.nytimes.com/2021/03/01/health/covid-19-coronavirus-brazil-variant.amp.html



Creekrhino 发表于 2021-03-03 08:07

疫苗有效期最短只有三四个月,这个在中国时就知道了。实际多长没法估计
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mindstorm
只要循环打疫苗,基本就是这样了,天天有感染的,但不影响生活。所以,TX全面开放了,今年秋天美国会全面开放。
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weiwei_ot2008
Sad
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jasonlong
巴西医生的访谈。 https://www.npr.org/2021/03/04/973791954/sao-paulo-prepares-for-lockdown-after-record-covid-19-deaths-in-brazil
Creekrhino 发表于 2021-03-05 11:17

巴西的例子不具有代表性,但是其他国家确实要把巴西当反面教材
A
Adventures
巴西的疫苗和5K人大代表的疫苗,有何不同?
c
coalpilerd
目前批准的疫苗中,一针有效性都达不到80-90%吧,是不是也不如自然的感染?
铁甲依然在 发表于 2021-03-03 20:14

如果自然感染的死亡率和后遗症比例跟疫苗差不多,那的确如你所言。= =
s
squirrel40
傻x总统 + 没有疫苗 + 人口高度集中的大城市 + 自由奔放的人民
集大成者。
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tigerpi314
疫苗有效期最短只有三四个月,这个在中国时就知道了。实际多长没法估计
mindstorm 发表于 2021-03-03 20:45

你说的是灭活疫苗。
b
babyflynn
看看楼主以前发的帖子,就知道怎么回事了。好,认同你,外国疫情没法结束了,咱们华人都赶紧回国吧,又不是没钱,回去跟国人抢各种资源不一定会输,怎么样?