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Home blood test for COVID-19 antibodies can measure vaccine effectiveness and progress toward herd immunity

A new COVID-19 antibody blood test developed by Northwestern University scientists requires only a single drop of blood self-collected at home. It could generate estimates of herd immunity, measure vaccine effectiveness in the general population and model the course of future waves of infection. For the test, a person would use a fingerstick to collect their blood sample on filter paper and mail it to a lab for analysis. This method would allow for large-scale testing of neutralizing antibodies against COVID-19.