“Evidence that Viruses Cause Disease” — Andrew Kaufman [Part 1]

Liz McLean Knight
4 min readApr 22, 2020

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Here are notes and commentary from Dr. Andrew Kaufman’s presentation “Evidence that Viruses Cause Disease or The Rooster in the River of Rats.”

Koch’s Postulates to establish a causative relationship between a microbe and a disease

(01:13) AK: Let’s talk about what Koch’s postulates are.

(01:14) There are four postulates and these are some common-sense rules¹ that were formulated originally in the late 1800s to provide a way to determine if a microorganism or germ causes a disease.

Koch’s first postulate

(01:31) The first postulate is the microorganism must be found in abundance in all organisms suffering from the disease but should not be found in healthy organisms — pretty common sense.

Koch’s second postulate

(01:43) Number two: the microorganism must be isolated² from a diseased organism or a person and grown in a pure culture.

Koch’s third postulate

(01:53) Three: the cultured microorganism should cause disease when introduced into a healthy organism — so once you’ve isolated it from a sick person and purified it then you can put it into a healthy person and cause the same disease.

Koch’s fourth postulate

(02:07) Fourth: you must be able to re-isolate that organism from the person that you made sick, and if you can do all these steps, you’ve proved pretty much proved conclusively that that microorganism or germ causes the disease.

Koch’s Postulates

  1. The microorganism must be found in abundance in all organisms suffering from the disease but should not be found in healthy organisms.
  2. The microorganism must be isolated from a diseased organism or a person and grown in a pure culture.
  3. The cultured microorganism should cause disease when introduced into a healthy organism — so once you’ve isolated it from a sick person and purified it then you can put it into a healthy person and cause the same disease.
  4. The microorganism must be re-isolated from the inoculated, diseased experimental host and identified as being identical to the original specific causative agent.
Koch’s postulates fulfilled for SARS virus according to Ron Fouchier et al. Nature 15 May 2003

(02:24) So, I came across this article [“Koch’s postulates fulfilled for SARS virus” 15 May 2003 https://www.nature.com/articles/423240a#Sec2] [PDF] that some of my viewers sent me, and it claims that Koch’s postulates have been fulfilled for the SARS virus. And this was published back in 2003 in Nature, which is one of the most prestigious scientific journals.

(02:41)And this is really important to point out, because I have been saying that Koch’s postulates have not been fulfilled, and this is also important because the SARS virus is SARS COV-1, in other words the other virus that supposedly is related to SARS COV-2 — which is another name for COVID-19.

(02:59) So, this is the the precursor virus to the current COVID-19 situation so it’ll give you a little bit of a historical background.

(03:12) So I want to point out that, right here — just between the title and what they say in the body of this article — already they’re misleading you.

{Continued in Part 2}

[1] LMK: These are logical postulates, or axioms. If each premise is true, then the conclusion is true. You don’t need to be a scientist to figure this out, you just need to use logic, which we all can do.

[2] The term “isolation” has been misused by contemporary virologists to mean something less specific and more malleable than the sense that was originally intended in Koch’s postulates. The term “purify” has not been quite as corrupted and is a better term in the current discourse (David Crowe (David.Crowe@cnp-wireless.com), The Infectious Myth podcast).

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Liz McLean Knight

A self-proclaimed “multi-hyphenate,” thoroughly immersed in technology, fashion, music and things in between.