This is a brief excerpt from The Infectious Myth, a Book Project by David Crowe. A chapter of the book is titled Antibody Testing for COVID-19. That chapter is 23 pages including footnotes.
Crowe is a Canadian researcher, and I have found him, like Dr. Andy Kaufman, to be diligent in all his work, and modest in temperament. They each realize that being wrong is always a possibility. That makes their research a faithful pursuit of truth, that is, they do their work aware of their own shortcomings. It is refreshing.
This excerpt begins on page 3. It discusses the current testing that is going on for antibodies to SARS-Cov-2, a hard thing to do given that this virus, said to cause COVID-19, has never been isolated and purified. They are short a gold standard of certainty of what they are doing. They could as easily and unknowingly be testing for measles.
A large number of population surveys have been compiled by Dean Beeler and they reveal a wide range of percentages of populations antibody positive, from less than 1% in many cases to 32% in a poor part of Boston. This is generally seen as an indication of how far through the population that the virus has rampaged. One flaw of most of these surveys is that the population is chosen non-randomly, and does not represent the general population. The group may be a household survey, volunteers, high school students and staff, health care workers, blood donors, or people going for blood tests at a lab.