Up to 60% of U.S. Covid-19 Cases Unreported, Disease Model Says

As many as 60% of Covid-19 cases in the U.S. have gone unreported, and the coronavirus has infected nearly 1 in 5 Americans, according to a new model out of the University of Washington.

The model, which aims to mitigate biases in data capture, estimates that 65 million people, or 19.7% of U.S. residents, had been infected as of March 7. The findings, which appear in Monday’s issue of Proceedings of the National Academy of Sciences, indicate the U.S. is unlikely to reach community level protection without continuing an ambitious vaccination campaign.