‘Already, though, experts are raising concerns about the validity of some of the studies and cautioning officials and the general public not to put too much weight on any one finding.
‘Known as serological surveys, the studies involve testing the blood of people not diagnosed with Covid-19 to determine whether they had previously been infected by the SARS-CoV-2 virus. They are important because they can flesh out the picture of how many people in any given community may have had Covid-19, even if they were unaware they were infected.‘
Read here (STAT News, April 24, 2020)
Download here Q&A from The Wadsworth Center (WC), the public health laboratory of the New York State Department of Health (NYSDOH)