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
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
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
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?
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
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
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。= =
集大成者。
你说的是灭活疫苗。