The test error rate is contained in documents cited by the study itself. You state the following:
“Everyone knows the denominator we are using to determine the case mortify rate it not correct.”
No sir. I do not know that, and some basic terms are required here. The “case mortality rate” uses the known cases as the denominator. It’s not a wrong number as you suggest. Rather, it conveys the chances of dying if you become sick. That is a figure of interest and value to many.
The infection mortality rate is what you seek to apply. It uses the total number of those infected by the virus as the denominator. That too is a legitimate number of interest. These are both numbers of value, for their own purposes, and the use of neither is wrong or incorrect.
I agree other studies are showing higher infection rates than confirmed cases, as would be expected. They are not showing the 85X multiplier suggested by the Santa Clara study. They are indicating much lower than that.