https://www.bitchute.com/video/oXLqKCVQWIPC/Only watched half of this, but it's enough to add a lot of weight to the hypothesis that Kaufman's job is to sew a lot of confusion and he's distinctly on the side (and/or payroll) of the medical/industrial complex. He's showing a lot of signs being deliberately dense about stuff which is really not that complicated for someone with a scientific background.
I've also been somewhat suspicious of Mikovits, but more and more I'm feeling like this is an artifact of the psychological operations against her which date back to things which happened a long time ago associated with the AIDS stuff.
Basically, Dr. Kaufman is simply saying that, according to accepted scientific medical standards for isolating a virus, viruses haven't been isolated. Dr. Kaufman relies heavily on Rivers' upgrade of Koch's Postulates as the method, even though he doesn't say it in this video.
Basically, Dr. Mikovits is saying that there is an overwhelming "substance" within infected tissues. She calls the substance a kind of virus, but she is unable/unwilling to talk about the actual isolation process.
Dr. Kaufman suggests that until we are certain of the virus through virus isolation, we don't really know what it is that is making up the substance that Dr. Mikovits is talking about, or if it is this substance that is really doing the harm and damage. Dr. Kaufman suggests that viruses are simply exosome messengers, but isn't given time to state this in this video.
Dr. Mikovits more or less contradicts herself on points regarding virus and not virus, and substances that are harming people. Certainly she recognizes that vaccines are doing more harm than good, and she explains it, saying way too much, way too fast, and leaving in-between steps out that we would need to hear to understand what she is really talking about.
The video presenter (not the host in the interview) seems to be very clear about what is going on regarding what Dr. Kaufman is saying. He clarifies much of the Dr. Kaufman would have said if he had been given the chance, starting at about 36 minutes.
The point is, if the medical accepts Rivers' upgrade of Koch's Postulates as the bottom-line standard for isolating a virus, then isolation of SARS-CoV-2 (and many/most other viruses) hasn't been done. This means that we don't really know if these unisolated viruses really exist as viruses or not. All this is based in the descriptions of what viruses are.
This isn't to say that processes being used are absolutely not beneficial for helping people. What it does say is that current medical processes are rather hit and miss processes. Sometimes they may work and other times they don't. Often they are way more dangerous than the disease they are trying to protect against.