Using dried blood spot samples (DBS) is an accurate alternative to venous blood in detecting SARS-CoV-2 antibody tests, a new study by immunology experts at the University of Birmingham has found.
Currently antibody testing for COVID-19 uses serum or plasma, which requires a full intravenous blood sample, collected by a trained phlebotomist. For population-wide or high volume testing, the use of such sampling is limited by logistic challenges, resources, and costs, as well as the risk of SARS-CoV-2 exposure from direct patient contact. In contrast, DBS sampling is simple, inexpensive and can be self-collected by the patient at home, using a simple finger prick.
