There's official claims in the UK that antibody testing will be available at home 'within days':
https://www.theguardian.com/world/2...home-testing-to-be-made-available-within-days
It is important to note that the "test, which looks like a pregnancy test and involves pricking the finger to produce a drop of blood, which is then analysed by the device, will first be validated in Oxford to ensure it works as well as scientists hope." That is, they don't actually know it works yet.
Assuming it does, that's potentially another tool to help manage the situation.