Quantitative Antibody Test (image) Howard Hughes Medical Institute Share Print E-Mail Caption Antibody tests detect an immune response in blood samples using a protein engineered to bind to SARS-CoV-2 antibodies. But creating an antibody test that's both sensitive and accurate can be tricky. Credit Howard Hughes Medical Institute Usage Restrictions Must use credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.