Seroprevalence of SARS-CoV-2 Assessed by Four Chemiluminescence Immunoassays and One Immunocromatography Test for SARS-Cov-2.
2021Frontiers in public health
Cerino P, Gallo A, Pierri B, Buonerba C, Di Concilio D +20 more
Plain English
Researchers tested 3,185 people in Italy using five different blood tests to detect antibodies showing they had been infected with COVID-19, comparing how well these tests matched each other's results. Most tests performed well and gave similar results, finding that about 2% of the population had been infected—a very low rate that explained why COVID was spreading so widely in the second wave. This comparison was important because these antibody tests were new and needed to be proven reliable before being used to track how many people in the community had actually had COVID.