g********0
发帖数: 6201 | 1 【 以下文字转载自 Military 讨论区 】
发信人: Qiguoji (我是个清纯的猥琐男), 信区: Military
标 题: CDC 和 Pfizer 打起来了
发信站: BBS 未名空间站 (Fri Jul 9 09:20:49 2021, 美东)
Pfizer 说 疫苗效力不够， 要打第三针；
CDC 说不要；
https://www.cnn.com/2021/07/08/health/pfizer-waning-immunity-bn/index.html
(CNN)Drugmaker Pfizer said Thursday it is seeing waning immunity from its
coronavirus vaccine and says it is picking up its efforts to develop a
booster dose that will protect people from variants.
Pfizer said it would soon publish data about a third dose of vaccine and
submit it to the US Food and Drug Administration, European Medicines Agency
and other regulators. The company specified it would seek FDA emergency use
authorization for a booster dose in August.
But in an unusual move, two top federal agencies said Americans don't need
boosters yet and said it was not up to companies alone to decide when they
might be needed.
Hours after Pfizer issued its statement, the FDA and Centers for Disease and
Control issued a joint statement saying Americans do not need booster shots
yet.
"Americans who have been fully vaccinated do not need a booster shot at this
time," they said.
Pfizer/BioNTech seek full FDA approval for their Covid-19 vaccine
Pfizer/BioNTech seek full FDA approval for their Covid-19 vaccine
In a statement to CNN on Friday, the World Health Organization said, "We don
't know whether booster vaccines will be needed to maintain protection
against COVID-19 until additional data is collected," adding, "limited data
available on how long the protection from current doses lasts and whether an
additional booster dose would be beneficial and for whom."
Pfizer and its partner BioNTech said evidence was building that people's
immunity starts to wane after they have been vaccinated. The Pfizer vaccine
requires two doses to provide full immunity.
"As seen in real world data released from the Israel Ministry of Health,
vaccine efficacy in preventing both infection and symptomatic disease has
declined six months post-vaccination, although efficacy in preventing
serious illnesses remains high," Pfizer said in a statement emailed to CNN.
"Additionally, during this period the Delta variant is becoming the dominant
variant in Israel as well as many other countries. These findings are
consistent with an ongoing analysis from the Companies' Phase 3 study," it
added.
"While protection against severe disease remained high across the full six
months, a decline in efficacy against symptomatic disease over time and the
continued emergence of variants are expected. Based on the totality of the
data they have to date, Pfizer and BioNTech believe that a third dose may be
beneficial within 6 to 12 months following the second dose to maintain
highest levels of protection." It gave no further details.
The announcement could have implications across the world. The Pfizer shot
is the cornerstone of vaccination programs in many countries. Two-thirds of
doses delivered across the European Union were made by Pfizer, according to
the European Center. In Israel, Pfizer is the only vaccine used.
Of the 158 million fully vaccinated people in the US, more than half
received the Pfizer shot.
White House doubles down on Covid-19 strategy as pressure from Delta variant
rises
White House doubles down on Covid-19 strategy as pressure from Delta variant
rises
US government officials have stressed that fully vaccinated people have a
low risk of infection, even from the Delta or B.1.617.2 variant, which is
more transmissible than earlier lineages of the virus.
Plus, several studies have indicated the mRNA vaccines made by Pfizer and
Moderna confer longterm protection.
"FDA, CDC, and NIH (the National Institutes of Health) are engaged in a
science-based, rigorous process to consider whether or when a booster might
be necessary. This process takes into account laboratory data, clinical
trial data, and cohort data -- which can include data from specific
pharmaceutical companies, but does not rely on those data exclusively," they
added.
It was a clear message to Pfizer, which has been hinting at the need for a
booster shot for months.
Covid vaccines can take on new coronavirus variants, studies show
Covid vaccines can take on new coronavirus variants, studies show
"We continue to review any new data as it becomes available and will keep
the public informed. We are prepared for booster doses if and when the
science demonstrates that they are needed," the CDC and FDA said in the
statement.
"The United States is fortunate to have highly effective vaccines that are
widely available for those aged 12 and up. People who are fully vaccinated
are protected from severe disease and death, including from the variants
currently circulating in the country such as Delta," the statement continued.
"People who are not vaccinated remain at risk. Virtually all COVID-19
hospitalizations and deaths are among those who are unvaccinated. We
encourage Americans who have not yet been vaccinated to get vaccinated as
soon as possible to protect themselves and their community."
Israel's health ministry said in a statement earlier this week that it had
seen efficacy of Pfizer's vaccine drop from more than 90% to about 64% as
the B.1.617.2 or Delta variant spread.
Pfizer vaccine protection takes a hit as Delta variant spreads, Israeli
government says
Pfizer vaccine protection takes a hit as Delta variant spreads, Israeli
government says
Pfizer said research showed booster doses of its vaccine, developed with
BioNTech, produced levels of neutralizing antibodies that are five to 10
times higher than what's produced after two doses.
It said it's also developing a new formulation for a booster dose that may
more thoroughly protect people from new variants.
"While Pfizer and BioNTech believe a third dose of BNT162b2 has the
potential to preserve the highest levels of protective efficacy against all
currently known variants including Delta, the companies are remaining
vigilant and are developing an updated version of the Pfizer-BioNTech COVID-
19 vaccine that targets the full spike protein of the Delta variant," the
company said. Current vaccines target just a piece of the spike protein --
the part of the virus it uses to attach to cells.
Get CNN Health's weekly newsletter
Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday
from the CNN Health team.
"The first batch of the mRNA for the trial has already been manufactured at
BioNTech's facility in Mainz, Germany. The Companies anticipate the clinical
studies to begin in August, subject to regulatory approvals." | C*******h
发帖数: 6095 | 2 哟，太阳从西边出来了啊，呵呵，狗咬狗一嘴毛，不打疫苗的吃瓜群众看好戏即可，支
持疫苗的现在傻眼了，2个都是science，听谁的？嘿嘿
【在 g********0 的大作中提到】
: 【 以下文字转载自 Military 讨论区 】
: 发信人: Qiguoji (我是个清纯的猥琐男), 信区: Military
: 标 题: CDC 和 Pfizer 打起来了
: 发信站: BBS 未名空间站 (Fri Jul 9 09:20:49 2021, 美东)
: Pfizer 说 疫苗效力不够， 要打第三针；
: CDC 说不要；
: https://www.cnn.com/2021/07/08/health/pfizer-waning-immunity-bn/index.html
: (CNN)Drugmaker Pfizer said Thursday it is seeing waning immunity from its
: coronavirus vaccine and says it is picking up its efforts to develop a
: booster dose that will protect people from variants.
| C*****h
发帖数: 926 | 3 mRNA疫苗，打一针，JJ和蛋蛋小一圈，心脏脱层皮。
打两针，JJ和蛋蛋缩一半，心肌细胞死一轮，永不再生。
打三针，JJ和蛋蛋没了，变成太监，得心肌炎暴毙。
根据这个文章末尾的描述，Pfizer已经在研究第四针了。哈哈。。。
一针又一针，唧唧复唧唧，病毒变种何其多，mRNA疫苗能奈何。
我默默地，又给我的JJ戴上一个新口罩。
【在 g********0 的大作中提到】
: 【 以下文字转载自 Military 讨论区 】
: 发信人: Qiguoji (我是个清纯的猥琐男), 信区: Military
: 标 题: CDC 和 Pfizer 打起来了
: 发信站: BBS 未名空间站 (Fri Jul 9 09:20:49 2021, 美东)
: Pfizer 说 疫苗效力不够， 要打第三针；
: CDC 说不要；
: https://www.cnn.com/2021/07/08/health/pfizer-waning-immunity-bn/index.html
: (CNN)Drugmaker Pfizer said Thursday it is seeing waning immunity from its
: coronavirus vaccine and says it is picking up its efforts to develop a
: booster dose that will protect people from variants.
| C*******h
发帖数: 6095 | 4 没关系，支持疫苗的一年无论扎几针都不会有怨言。北美华人上不少大妈大姐大妹子打
了疫苗后发帖说自己的大姨妈乱了，都在头疼要不要继续扎针，嘿嘿
【在 C*****h 的大作中提到】
: mRNA疫苗，打一针，JJ和蛋蛋小一圈，心脏脱层皮。
: 打两针，JJ和蛋蛋缩一半，心肌细胞死一轮，永不再生。
: 打三针，JJ和蛋蛋没了，变成太监，得心肌炎暴毙。
: 根据这个文章末尾的描述，Pfizer已经在研究第四针了。哈哈。。。
: 一针又一针，唧唧复唧唧，病毒变种何其多，mRNA疫苗能奈何。
: 我默默地，又给我的JJ戴上一个新口罩。
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