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CDC Science Brief: COVID-19 Vaccines and Vaccination
Center for Disease Control ^ | 09/15/2021 | CDC

Posted on 10/13/2021 11:24:17 PM PDT by Brian Griffin

Vaccine efficacy refers to how well a vaccine performs in a carefully controlled clinical trial, and effectiveness describes its performance in real-world observational studies. Evidence demonstrates that the approved or authorized COVID-19 vaccines are both efficacious and effective against symptomatic, laboratory-confirmed COVID-19, including severe forms of the disease. In addition, as shown below, a growing body of evidence suggests that COVID-19 vaccines also reduce asymptomatic infection and transmission.

Rhesus macaque challenge studies provided the first evidence of the potential protective effects of Pfizer-BioNTech, Moderna, and Janssen COVID-19 vaccines against SARS-CoV-2 infection, including both symptomatic and asymptomatic infection. Vaccinated macaques developed neutralizing antibodies that exceeded those in human convalescent sera and showed no or minimal signs of clinical disease after SARS-CoV-2 challenge. In addition, COVID-19 vaccination prevented or limited viral replication in the upper and lower respiratory tracts, which may have implications for transmission of the virus among humans

There is now a substantial volume of scientific literature examining the effectiveness of COVID-19 vaccination against SARS-CoV-2 infection, symptomatic disease, and other clinical outcomes; detailed summaries of these studies are available in the International Vaccine Access Center’s VIEW-Hub resource library[https://view-hub.org/resources].

Studies from the United Kingdom have noted effectiveness of the Pfizer-BioNTech vaccine against confirmed infection (79%) and symptomatic infection (88%)

Notably, in the United Kingdom, Canada, Qatar, South Africa, and Israel, vaccine effectiveness against hospitalization related to Delta was >90%

The United Kingdom and Canada used prolonged intervals of 12–16 weeks between vaccine doses, which have been observed to induce higher immunogenicity and effectiveness.

Table 1a. Effectiveness of COVID-19 Vaccination Against SARS-CoV-2 Infection and Symptomatic Disease (Including Severe Disease and Hospitalization) Caused by the Delta Variant

United States Healthcare workers, first responders, and other essential and frontline workers Pfizer-BioNTech, Moderna, or Janssen SARS-CoV-2 infection 66%(26%-84%)

United States Health system members ≥12 years Pfizer-BioNTech SARS-CoV-2 infection 75%(71%-78%) Hospitalization 93%(84%-96%)

In addition to preventing morbidity and mortality associated with COVID-19, currently approved or authorized vaccines also demonstrate effectiveness against asymptomatic SARS-CoV-2 infection....

Table 1b. Effectiveness of COVID-19 Vaccination Against Asymptomatic SARS-CoV-2 Infection When Different Variants Predominated

Qatar General population ≥12 years Moderna Delta 80%(54%-93%) Pfizer-BioNTech Delta 36%(11%-54%)

Two studies have observed poor antibody response to the Pfizer-BioNTech vaccine among nursing home residents compared with staff ; one study noted 38% of nursing home residents had undetectable antibodies to the Beta variant at 2–4 weeks after the second dose of Pfizer-BioNTech vaccine, compared with 12% with Moderna vaccine. Another study showed declining antibody levels among nursing home residents, with 72% of residents having undetectable neutralizing antibody levels at 6 months post-vaccination with Pfizer-BioNTech.

A study of U.S. long-term care residents, who were among the first groups in the United States to be vaccinated, found effectiveness of mRNA vaccination against infection declined from 75% in March–May 2021 to 53% in June–July 2021.

For the Delta variant, early data indicate vaccinated and unvaccinated persons infected with Delta have similar levels of viral RNA and culturable virus detected, indicating that some vaccinated people infected with the Delta variant of SARS-CoV-2 may be able to transmit the virus to others. However, other studies have shown a more rapid decline in viral RNA and culturable virus in fully vaccinated people. One study observed that Delta infection in fully vaccinated persons was associated with significantly less transmission to contacts than persons who were unvaccinated or partially vaccinated.


TOPICS: Health/Medicine; Reference; Science
KEYWORDS: briangriftin; ccpbioweapon; cdc; covid; effectiveness; frccpmoles; herecometheqtards; kneepads4gates; vaccine
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To: heavy metal

I have asked you again and again not to reply to me.


61 posted on 10/14/2021 4:03:52 PM PDT by firebrand
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To: dynoman

92,000 new cases a day in the United States.


62 posted on 10/14/2021 4:10:23 PM PDT by firebrand
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To: BlueMondaySkipper
those deaths got lumped into the covid numbers

Runner-up for the favorite line of the anti-vaxxers.

63 posted on 10/14/2021 4:12:26 PM PDT by firebrand
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To: chuck allen

For decades many industries dumped toxic waste all over the place with virtually no reported deaths from toxic waste.

The key, of course, was _reported_ deaths, because people did not make the connection between the toxins and the deaths.

Another key was the companies tried to hide the dangers of their chemicals from public scrutiny. They hired professional public relations and advertising firms to make sure they kept their positive image with the public.

They made substantial political contributions to politicians to keep them “on the reservation” arguing about the importance of the business to the local economy.

They were also quite ruthless in silencing whistleblowers.

Sound familiar?

It should.

This is _exactly_ what we are seeing now with these vaxxes—in a decade or so it will be obvious—but for now you will actually have to use a little thought to figure it out—nobody is going to spoon feed the correct data to you.


64 posted on 10/14/2021 4:18:41 PM PDT by cgbg (A kleptocracy--if they can keep it. Think of it as the Cantillon Effect in action.)
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To: firebrand; Admin Moderator

you are ridiculing people and posting accusations on an open forum...

your attempting to silence people that are countering your ridicule and accusations is alynsky style tactics...

if you don’t like people replying to you then maybe you shouldn’t be replying to anyone at all on this site...


65 posted on 10/14/2021 4:23:24 PM PDT by heavy metal (smiling improves your face value and makes people wonder what the hell you're up to... 😁)
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To: bagster
Speaking of cardio; check out this Pfizer executive running from a Project Veritas reporter. Doesn't she know obesity puts you at risk from COVID???
66 posted on 10/14/2021 4:30:32 PM PDT by who knows what evil? (Yehovah saved more animals than people on the ark...siameserescue.org)
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To: heavy metal

Knock it off.


67 posted on 10/14/2021 4:43:07 PM PDT by Jim Robinson (Resistance to tyranny is obedience to God.)
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To: Jim Robinson

yes sir... 😇...


68 posted on 10/14/2021 4:53:11 PM PDT by heavy metal (smiling improves your face value and makes people wonder what the hell you're up to... 😁)
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To: ransomnote

1,822 cases of flu last year? Then WHAT are they basing the formulation of this year’s flu vaccine on...flu vaccine mandates are hitting the employees at health care systems NATIONWIDE as we speak...just what the hell is in those vaccines??? Hmmm..?


69 posted on 10/14/2021 5:15:46 PM PDT by who knows what evil? (Yehovah saved more animals than people on the ark...siameserescue.org)
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To: who knows what evil?

Fauci said he wanted to combine Covid vax with flu vax.

Obama signed some EO or other that made it legal to deny us informed consent if it was for our ‘benefit’ during a pandemic.
So - they put whatever they want in any needle or drug they give us now. :(


70 posted on 10/14/2021 5:18:01 PM PDT by ransomnote (IN GOD WE TRUST)
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To: chuck allen; ransomnote

What a total joke these shots and shot mandates are, then.

If you’re going to get china virus....as this article, that you posted, implies you will....then why take the absurd shot?

I just read another article, this morning, about Quercetin giving nearly the exact same protections, as these hazardous shots....withOUT the adverse effects.


71 posted on 10/14/2021 7:18:30 PM PDT by Jane Long (What we were told was a “conspiracy theory” in 2020 is now fact. 🙏🏻 Ps 33:12 )
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To: who knows what evil?
Speaking of cardio; check out this Pfizer executive running from a Project Veritas reporter. Doesn't she know obesity puts you at risk from COVID???


72 posted on 10/15/2021 12:15:49 AM PDT by bagster ("Even bad men love their mamas".)
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