According to an extrapolation, around nine times as many people in the USA were infected with the virus at the beginning of the corona pandemic than are known according to official statistics. In the period from about mid-January to mid-April, there may have been around six and a half million cases in the country, write the scientists working with Jade Benjamin-Chung and Sean Wu from the University of California at Berkeley in the journal “Nature Communications”. Official statistics indicate 721,245 cases for this period.
