Germany is staring large-scale antibody testing:
Germany is to carry out Europe’s first large-scale coronavirus
antibody testingin an effort to help researchers assess infection rates and monitor the spread of the virus more effectively.
Lothar Wieler, head of the Robert Koch Institute, on Thursday announced details of three serological tests — one of blood donations, one involving four areas of the country that had seen large outbreaks of the virus and a representative study of the broader population.
In the first, up to 15,000 samples will be taken every 14 days from blood donations. The second will concentrate on four areas worst affected by Covid-19, with representative blood samples taken from about 2,000 people. For the first and second surveys, work will start next week, with the first results expected in May.
https://www.ft.com/content/fe211ec7-...3-14b639efb3ad
Hopefully other countries follow. It seems various institutions are launching smaller scale efforts now. But you'd think national public health officials would all want to build some data-based models of the state of the infection in their populations.