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How does the PCR test distinguish between Covid-19 and the Delta variant?

Posted on 07/29/2021 7:29:44 AM PDT by Scooter100

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To: Scooter100

During the course of the pandemic, it has been recognized that positive tests with a high cycle threshold may be detecting very small amounts of viral genetic material or “non viable fragments” rather than active virus.

A positive test at the higher cycle thresholds normally represent someone with a lower concentration of virus.

So, our CDC/WHO now mandating lower cycle values....is “just to standardize things, not affect case counts because most cases are positive enough with the lower cycles”.....right, let’s lower the amount of cycles and even though we will have less positive tests because of this.....no manipulation, move along, nothing to see here, no deception, just a minor change....at least according to all the “fact checkers” that tell us what to think.


41 posted on 07/29/2021 10:07:17 AM PDT by consult
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To: semimojo

I honestly don’t know what this is even supposed to mean. Virus “not isolated”?? Usually in these situations there is some grain of truth being twisted or misunderstood in some way. Is semi saying that the virus doesn’t exist; it was a hoax just like the moon landing?


42 posted on 07/29/2021 10:08:36 AM PDT by BDParrish (God called, He said He'd take you back!)
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To: cbvanb
The CDC website states exactly this, the PCR does not distinguish between any of the Covid variants...

It turns out that the influenza virus isn't a Covid variant.

The test in question is being withdrawn because all it can identify is SARS CoV-2 and other panels are available that can also identify influenza and other respiratory virus from a single sample.

The RT PCR test never confused influenza and SARS CoV-2 and the CDC never said it did.

43 posted on 07/29/2021 10:08:44 AM PDT by semimojo
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To: BDParrish
Usually in these situations there is some grain of truth being twisted or misunderstood in some way.

Pretty funny, huh?

It's almost certainly the most frequently sequenced virus in history and 2 seconds of searching finds databases with hundreds of thousands of gene sequences that have been done as well as the CDC's offer to send you an isolated virus sample if your lab qualifies.

44 posted on 07/29/2021 10:14:12 AM PDT by semimojo
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To: Scooter100
The CDC's annual data on influenza is actually just a sampling from about 20% of the USA population.

The sampling is then tortured for about 6 months in various mathematical models and released in late summer.

NCHS collects weekly data on PIC (pneumonia, influenza, COVID), from death certificates, I believe.

Later this evening I will send you Web directions to their 2013-2021 spreadsheet.

The CDC does not count COVID deaths the same way it counts Influenza deaths.

COVID + Pneumonia or ARDS = 100% COVID death

Influenza + Pneumonia or ARDS = 10%-20% Influenza death

45 posted on 07/29/2021 10:15:42 AM PDT by zeestephen
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To: rarestia

The new tests will detect both covid AND the flu. The OLD test only detected Covid, but if you had symptoms you then were puzzled as to what you had. So they want a test that will determine if you have covid or the flu. People are misunderstanding that the first test didn’t discern between the two.... that is false. The original pcr ONLY detected Covid.


46 posted on 07/29/2021 11:01:59 AM PDT by Katya (lacking in the feelings department, )
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To: semimojo

If it indeed had been isolated, as so many sites like to claim, why did it take over a year to determine that the PCR test was so ineffective that it couldn’t distinguish between what is known as Covid (and other names) and influenza?


47 posted on 07/29/2021 11:55:16 AM PDT by Robert DeLong
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To: Robert DeLong
...why did it take over a year to determine that the PCR test was so ineffective that it couldn’t distinguish between what is known as Covid (and other names) and influenza?

It didn't. When the CDC got the EUA for that test they made it clear it was to detect SARS CoV-2 only.

That's what it did and it never confused the influenza virus with the coronavirus causing Covid.

There are now approved test panels that can identify SARS CoV-2, influenza and other respiratory virus from a single sample and the CDC is recommending labs use one of those.

48 posted on 07/29/2021 12:07:04 PM PDT by semimojo
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To: semimojo
07/21/2021: Lab Alert: Changes to CDC RT-PCR for SARS-CoV-2 Testing

After December 31, 2021, CDC will withdraw the request to the U.S. Food and Drug Administration (FDA) for Emergency Use Authorization (EUA) of the CDC 2019-Novel Coronavirus (2019-nCoV) Real-Time RT-PCR Diagnostic Panel, the assay first introduced in February 2020 for detection of SARS-CoV-2 only. CDC is providing this advance notice for clinical laboratories to have adequate time to select and implement one of the many FDA-authorized alternatives.

Visit the FDA website for a list of authorized COVID-19 diagnostic methods. For a summary of the performance of FDA-authorized molecular methods with an FDA reference panel, visit this page.

In preparation for this change, CDC recommends clinical laboratories and testing sites that have been using the CDC 2019-nCoV RT-PCR assay select and begin their transition to another FDA-authorized COVID-19 test. CDC encourages laboratories to consider adoption of a multiplexed method that can facilitate detection and differentiation of SARS-CoV-2 and influenza viruses. Such assays can facilitate continued testing for both influenza and SARS-CoV-2 and can save both time and resources as we head into influenza season. Laboratories and testing sites should validate and verify their selected assay within their facility before beginning clinical testing.

FDA Announces That CDC’s PCR Test FAILED Review, Will Have Emergency Use Authorization REVOKED

CDC Quietly Suggests COVID-19 Testing Labs STOP Using PCR Testing, FDA Announces Class 1 Recall on Other Rapid COVID-19 Tests

Why Is The CDC Quietly Abandoning The PCR Test For COVID?

49 posted on 07/29/2021 12:55:55 PM PDT by Robert DeLong
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To: Robert DeLong
Thanks, just as I said.

...the assay first introduced in February 2020 for detection of SARS-CoV-2 only. CDC is providing this advance notice for clinical laboratories to have adequate time to select and implement one of the many FDA-authorized alternatives.

The test works fine but there are broader ones now available.

FDA Announces That CDC’s PCR Test FAILED Review, Will Have Emergency Use Authorization REVOKED

LOL. The first part is an outright lie - as your statement from the CDC proves the test didn't fail any review - and the FDA is REVOKING the authorization because the CDC asked them to.

I think I see why you post misinformation to deceive other FReepers - you rely on sources that are lying to you and you can't figure it out.

50 posted on 07/29/2021 2:23:15 PM PDT by semimojo
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To: semimojo
You probably think this person is spewing misinformation as well:

The Vaccine Causes The Virus To Be More Dangerous

But we know that the PCR test is as worthless as your arguments are.

51 posted on 07/29/2021 2:52:01 PM PDT by Robert DeLong
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To: cbvanb

That’s exactly what I said, Post 18. The PCR test cannot tell the difference between the variants. What the hell are you talking about?

But the idiots saying that the PCR test can’t tell the difference between Covid and the Flu? Those people are wrong. The new PCR test can tell you if you have Covid, or if you have the flu. The old PCR test could only tell you if you had Covid. That’s why they only give the new test now, because it’s better, but not because it was positive in either case. That’s just a lie, and it appears on this thread about a half-dozen times.


52 posted on 07/29/2021 3:03:25 PM PDT by babble-on
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To: Scooter100

Here is the rather complex link to weekly deaths from 2013-2021.

I have literally spent hours searching for a direct link, but I cannot find one.

https://www.cdc.gov/flu/weekly/index.htm

(1) Scroll 60% down the page to the title: National Center for Health Statistics (NCHS) Mortality Surveillance

(2) Directly below is a chart titled: Pneumonia, Influenza, and COVID-19 Mortality

(3) Directly below the chart, click on: View Chart Data

(4) On my computer, it loads into an Excel spreadsheet

(5) All the columns are labeled on line: 2013 - Week 40

(6) All the numbers come from death certificates, so assume the numbers in the last six weeks in 2021 are incomplete and should not be quoted as proof of anything.

(7) One really weird anomaly I cannot figure out - columns H, I, J are for Pneumonia, Influenza, and COVID-19 deaths. Column K is for the total of PIC deaths. But, column K NEVER has the correct sum. I have no idea why.

Good luck!


53 posted on 07/30/2021 6:13:48 AM PDT by zeestephen
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