How is the COVID-19 antibody test conducted?

To conduct an antibody test for COVID-19 , typically a health care professional takes a blood sample, usually by a finger prick or by drawing blood from a vein in your arm. Then the sample is tested in a lab to determine whether you've developed antibodies against the COVID-19 virus.

When I was tested for COVID, a nasal sample ( test results in 15 minutes)and a blood sample was taken by drawing blood, ( test results within three days).