[loftyal]

The tests might be inaccurate. Current antibody tests seem to conflate the common cold with covid-19, as they are both coronaviruses.

https://edition.cnn.com/2020/04/14/health/coronavirus-antibo...

[JetSetWilly]

That is not the case for this study, see here for why:

https://news.ycombinator.com/item?id=22879363

[loftyal]

That is good news if that's the case!