Who has had a covid antibody test?

[The Velveteen Ocelot]

7. My brother had one; it was negative.

He had what seemed like a very nasty cold or flu in late February, at a time when no cases had been reported in our state. Later, when there were reports that the virus might have been here sooner than we thought, he got to wondering whether he had it, so he got tested last week but his antibody test came back negative. It probably was flu after all.