It was the blood test to see if I had it in the past.
Sorry, I failed to read what you posted carefully (nasal swab or antibody test).
Could be the test providing a false negative.
Maybe not everyone is susceptible to contracting the disease (for some yet unknown reason), which would be a new factor in achieving herd immunity (added to those with antibodies).
Do you know if these Quest Diag offices all perform this test? Most?