I don’t find this at all surprising.
The first large-scale coronavirus antibody study of 3,300 people in Santa Clara County, Calif., found that 2.5 to 4.2% of those tested were positive for antibodies, suggesting more people have been infected with the disease than public health officials have counted.
The study published Friday estimates that 48,000 to 81,000 people in the county of 2 million could be infected. In early April when the samples were taken, approximately 1,000 confirmed cases were recorded by the county.
Researchers estimate there are likely 50 to 80 times more infections in the state's counties than what is being reported.
If this holds true for other states, the proportion of the population that has been exposed to the COVID-19 virus is far higher than the 686,991 confirmed cases that Johns Hopkins is now reporting.
That would mean millions Americans could have been exposed to the Corona Virus, and have developed antibodies.