Antibody tests suggest that 6% of the UK population has had Covid-19. That is 3.4 million people, 10 times the official count.

It is puzzling that only 32% of those 3.4 million reportedly had no Covid-19 symptoms. That implies 2.4 million did have symptoms; how did the system overlook them?

Has it been demonstrated that antibodies to other diseases don't test positive on this test? It would be useful to do that experiment in New Zealand, where hardly anyone has had Covid-19 — but there do seem to be asymptomatic cases spreading the disease occasionally.