Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Effectiveness of COVID-19 Vaccines in Preventing SARS-CoV-2 Infection Among Frontline Workers Before and During B.1.617.2 (Delta) Variant Predominance — Eight U.S. Locations, December 2020–August 2021 (after Delta, VE falls from 91% to 66%)
CDC's Morbidity and Mortality Weekly Report ^ | August 24, 2021 | Ashley Fowlkes, ScD; Manjusha Gaglani, MBBS; Kimberly Groover, PhD; more at link

Posted on 08/27/2021 8:30:00 PM PDT by DoodleBob

During December 14, 2020–April 10, 2021, data from the HEROES-RECOVER Cohorts,* a network of prospective cohorts among frontline workers, showed that the Pfizer-BioNTech and Moderna mRNA COVID-19 vaccines were approximately 90% effective in preventing symptomatic and asymptomatic infection with SARS-CoV-2, the virus that causes COVID-19, in real-world conditions (1,2). This report updates vaccine effectiveness (VE) estimates including all COVID-19 vaccines available through August 14, 2021, and examines whether VE differs for adults with increasing time since completion of all recommended vaccine doses. VE before and during SARS-CoV-2 B.1.617.2 (Delta) variant predominance, which coincided with an increase in reported COVID-19 vaccine breakthrough infections, were compared (3,4).

...

During Delta variant–predominant weeks at study sites, 488 unvaccinated participants contributed a median of 43 days (IQR = 37–69 days; total = 24,871 days) with 19 SARS-CoV-2 infections (94.7% symptomatic); 2,352 fully vaccinated participants contributed a median of 49 days (IQR = 35–56 days; total = 119,218 days) with 24 SARS-CoV-2 infections (75.0% symptomatic). Adjusted VE during this Delta predominant period was 66% (95% CI = 26%–84%) compared with 91% (95% CI = 81%–96%) during the months preceding Delta predominance.

...The VE point estimates declined from 91% before predominance of the SARS-CoV-2 Delta variant to 66% since the SARS-CoV-2 Delta variant became predominant at the HEROES-RECOVER cohort study sites; however, this trend should be interpreted with caution because VE might also be declining as time since vaccination increases and because of poor precision in estimates due to limited number of weeks of observation and few infections among participants...

(Excerpt) Read more at cdc.gov ...


TOPICS: News/Current Events
KEYWORDS: covid19; vaccineefficacy; vaccines
Navigation: use the links below to view more comments.
first 1-2021 next last
Important points to note:

1. This is on the CDC's own website.

2. The purpose of these shots is for the prevention of COVID-19 disease; not lessened symptoms if you get it, not to save your life, or stop bad breath. It is for "the prevention of" the virus.

3. If these shots are at 61% VE with Delta, forget a booster: it should be on the verge of having it's EUA pulled. Per NBC, the FDA has made clear that any vaccine must be at least 50 percent effective. And while the studies are designed to run for two years, companies may get enough evidence the shots are protective — in at least some people — to stop the trials early and seek what’s called an “emergency use authorization” for wider vaccinations.

1 posted on 08/27/2021 8:30:00 PM PDT by DoodleBob
[ Post Reply | Private Reply | View Replies]

To: DoodleBob

None of these people care if you live or die. Shot or no shot.

They only care if the hospital fills up.

That’s it.


2 posted on 08/27/2021 9:01:25 PM PDT by Mariner (War criminal #18)
[ Post Reply | Private Reply | To 1 | View Replies]

To: DoodleBob

The overlooked irony is the sharp decline of SARS prior to the rollout of the initial Feb/March vax rollout


3 posted on 08/27/2021 9:04:53 PM PDT by Gene Eric (Don't be a statist!)
[ Post Reply | Private Reply | To 1 | View Replies]

*prior to the initial...


4 posted on 08/27/2021 9:06:10 PM PDT by Gene Eric (Don't be a statist!)
[ Post Reply | Private Reply | To 3 | View Replies]

To: Mariner

Blowing out the lungs paid very well — $38k per COVID corpse.

The medical community is a cult


5 posted on 08/27/2021 9:09:44 PM PDT by Gene Eric (Don't be a statist!)
[ Post Reply | Private Reply | To 2 | View Replies]

To: DoodleBob

Incoming: Marek’s


6 posted on 08/27/2021 9:10:11 PM PDT by Dr.Deth
[ Post Reply | Private Reply | To 1 | View Replies]

Comment #7 Removed by Moderator

To: Free Republicans

Welcome to FR!


8 posted on 08/27/2021 9:43:48 PM PDT by Gene Eric (Don't be a statist!)
[ Post Reply | Private Reply | To 7 | View Replies]

To: DoodleBob

Does anyone actually listen to or care what the CDC says anymore after all the lies and BS they’ve been peddling?


9 posted on 08/27/2021 10:06:08 PM PDT by Boomer (Leftism ruins everything it touches. NUTS - Not United Tragic States.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Boomer
Per NY Post last month, Sixty-eight percent of Americans said they are “confident” in the advice given by Fauci — down from the 71 percent who said so in April, but on par with the 68 percent of respondents in August 2020.
10 posted on 08/27/2021 10:12:48 PM PDT by DoodleBob (Gravity's waiting period is about 9.8 m/s^2)
[ Post Reply | Private Reply | To 9 | View Replies]

To: DoodleBob

I went thru the study carefully.

Important item:

They say Vaccine Effectiveness is down to 66% during Delta predominant weeks.

BURIED IN THE LINK IS THE DEFINITION OF “DELTA PREDOMINANT”. It is genomic sequencing on cases finding > 50% Delta.

As time passes Delta is more and more and more the virus of a case. When a population is 75% Delta, the VE is likely far down from 66%. Mayo was likely right 42% and crashing further. When Delta is 95%?

Uh oh.


11 posted on 08/27/2021 11:01:15 PM PDT by Owen
[ Post Reply | Private Reply | To 10 | View Replies]

To: DoodleBob

So 68% of the population are gullible and naive idjits.

Okay.


12 posted on 08/28/2021 12:09:36 AM PDT by Boomer (Leftism ruins everything it touches. NUTS - Not United Tragic States.)
[ Post Reply | Private Reply | To 10 | View Replies]

To: DoodleBob

it does prevent disease - in 90% of wild covid (the original wuhan covid) and 66% for the mutated Delta variant. Those that fall outside the 90% or 66% will be more at risk of being symptomatic and a portion will have long covid or more severe disease.

there are some studies coming out that point to waning natural immunity to variants - that is, if you caught covid last year when the wild Wuhan was circulating, you may not be as immune to the Delta variant that has mutated immune escape tricks. This lower immunity is mirrored in the reduced efficacy of the vaccine, which is built on the wild type Wuhan platform. Because virus virus.


13 posted on 08/28/2021 12:10:19 AM PDT by blueplum ("...this moment is your moment: it belongs to you... " President Donald J. Trump, Jan 20, 2017) )
[ Post Reply | Private Reply | To 1 | View Replies]

To: DoodleBob

vaccine create the variant. Given there is no way for the public to know what variant they have. I would suggest the Delta variant is much smaller percentage of those infected then what is reported.


14 posted on 08/28/2021 2:01:51 AM PDT by Steve Van Doorn (*in my best Eric Cartman voice* 'I love you, guys')
[ Post Reply | Private Reply | To 1 | View Replies]

To: DoodleBob
said, "Sixty-eight percent of Americans said they are “confident” in the advice given by Fauci"

The information is out there. I simply do not believe that many in the US are that freaking stupid
15 posted on 08/28/2021 2:03:52 AM PDT by Steve Van Doorn (*in my best Eric Cartman voice* 'I love you, guys')
[ Post Reply | Private Reply | To 10 | View Replies]

To: DoodleBob
https://vimeo.com/591952240

I HIGHLY RECOMMEND WATCHING ALL OF THIS IT GOES INTO VACCINES NEAR THE END
COONCLUSION VACCINES SHOULD BE STOPPED
delta is dominate vaccinated are superspreaders not unvaccinated vaccine effectiveness must be over 50% for one year and they are not..

16 posted on 08/28/2021 2:20:14 AM PDT by rolling_stone
[ Post Reply | Private Reply | To 1 | View Replies]

To: DoodleBob

Have to wonder how they ’prove’ anything since they don’t test the people vaccinated to see if they are positive- they didn’t in the ‘trials’ before starting injecting everyone and they don’t now. But ‘test’ heck out of everyone else. Other studies have shown vaccinated DO get it and DO spread it AND may even walk around with high titers in respiratory system (nose) spreading it. These vaccines are not about resolution of a pandemic. I wish everyone would stop testing-in Florida they are promoting mass testing at schools promoting all kinds of ridiculous panic. Children rarely die from Covid and those that have had comorbidities. Your kid is much more likely to die from drowning. Everyone STOP TESTING!!! and let’s see how quickly the BS stops


17 posted on 08/28/2021 4:36:58 AM PDT by dkGba (God Bless America dkGba)
[ Post Reply | Private Reply | To 1 | View Replies]

To: DoodleBob

We’ve constantly been lied to by the CDC and Fauci through this entire China Virus mess.


18 posted on 08/28/2021 5:11:43 AM PDT by From The Deer Stand
[ Post Reply | Private Reply | To 1 | View Replies]

To: DoodleBob

66% with the shot is still better than 0% without the shot, especially if you have co-morbidities.


19 posted on 08/28/2021 7:54:02 AM PDT by Socon-Econ (adi)
[ Post Reply | Private Reply | To 1 | View Replies]

To: DoodleBob
If these shots are at 61% VE with Delta

They are at 42% efficacy according to Mayo Clinic study.

From: Don’t Panic, But Breakthrough Cases May Be a Bigger Problem Than You’ve Been Told Current public-health messaging may understate the scale and risk.

20 posted on 08/28/2021 8:02:16 AM PDT by M. Thatcher
[ Post Reply | Private Reply | To 1 | View Replies]


Navigation: use the links below to view more comments.
first 1-2021 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson