This antibody test, to clarify, is NOT an alternative to the Coronavirus test. That one is advised if you think you’re sick and want to be sure it’s with COVID. The antibody test on the other hand, is for when you think you have had COVID at some point.
From my POV, I’ll be happy if I have antibodies. The Delta variant appears less deadly, and it’s easily transmitted. I’m out and about a lot, and I just got over a few days of being sick with a headache and sore throat, muscle aches, a slight fever – the apparently mild symptoms of Delta. So maybe I’ve had it.
But the only way to prove it is to have an antibody test.
The test, per WebMD, is a simple finger-prick blood test done at a lab. See here:
https://www.webmd.com/lung/antibody-testing-covid-19#1
I saw a DIY test kit (contained 2 tests) from Abbott for sale at Walgreens for under $25. And that’s full retail pricing.