EzDx™ COVID-19 neutralizing antibody rapid test is an Immuno-chromatographic based one step in vitro test. The test is intended for professional and laboratory use as an aid in semi-quantitatively monitoring human SARS-CoV-2 neutralizing antibodies in human finger stick blood, serum and plasma specimens after vaccination. Subjects who have been vaccinated with COVID-19 vaccines will typically see a visible test line two weeks after vaccination.