Below is an example of a death certificate from the Nat'l Vital Statistics System (NVSS), a CDC branch that is in charge of D.C. collection/reporting. This is a quick explanation of how Covid-19 deaths are reported and where the "6%" came from and why it isn't important. 
Generally, NVSS guidelines suggest any death caused by Covid be listed in Part I, which lists all causes in the chain of events leading to death right up to the final underlying cause (Line A). Any death Covid is listed in Part I is supposed to be lowest line (underlying cause).
Pneumonia, for instance, is frequently brought on by both Covid and the flu. So a person could have PN listed on Line A as being the immediate cause, but CV would be the UCOD below it. This would be the same as the flu, except we don't actually confirm flu like we do this.
In this example, PN is considered a comorbidity. People are confusing comorbidities with previously underlying causes. This is why we can't say only 6% died with Covid. If anything, CV should have caused additional comorbidities like PN or ARDS, for example.
Currently, CV is listed as the UCOD on 92% of all DCs. In the other 8%, it's listed in Part II as a "contributing" factor to death. This is really a misnomer because most of these situations are accidents, suicides, etc. where common sense should dictate CV did not contribute.
So does this mean 92% are legit? Well, no. There are thousands of probable/presumed deaths never confirmed plus states are using "death certificate matching" to also match DCs with previously tested positive cases that were never listed on the DC and assigning it as UCOD.
In summation, the 6% without any other listed causes should have probably had other comorbidities. It does almost always cause additional organ failure when it's a legit death and it doesn't mean the person had underlying conditions (though usually they do).
Where CV is being overcounted is how many times it's truly the UCOD. Between probables/DCM, they're taking liberties. To better estimate true deaths *from*, we're going to have to continue analyzing excess deaths minus lockdowns deaths. But that will be a lengthy process.
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