Keywords COVID-19 Seroprevalence Tasso device Self-collection Anti-SARS-CoV-2 antibody measurement 1. Introduction Collection of blood samples for seroprevalence studies can be challenging, especially those that are large-scale. In many studies, participants are asked to provide a venous blood sample. This method is logistically challenging, requiring skilled phlebotomists who are frequently in high demand for clinical services, and associated with some discomfort.
