Study: Only 5% of Spanish Population has Covid-19 Antibodies [pdf]
ciencia.gob.es
ciencia.gob.es
But there were influential dissenters, e.g. the infamous Stanford study a few weeks ago estimating nearly 3% infected in Santa Clara County, or the Swedish authorities’ conviction that 25-30% of the population in Stockholm is infected.
This study seems to provide pretty strong evidence that those estimates were too high... not that I expect it to change anyone’s mind at this point.