Both France and Spain just announced results of major widespread antibody testing, which determines if someone has been exposed to a virus or not.
Both countries found ~5% of people exposed, 95% not.
Both of those countries have been hit much harder (measured in deaths) than the USA. Spain has 581 deaths (per million), France is 415, USA is 254.
Even Europe's hardest hit major countries and early hot spots have a long way to go to reach herd immunity. This test is also further evidence against the hypothesis that COVID-19 was secretly circulating broadly for weeks or months before it became public knowledge.
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