“The United States alone is estimated to have had 905,000 Covid-19 fatalities, vastly more than the 579,000 deaths officially reported, and more than any other country. The calculation is based on modeling of excess mortality that has occurred during the pandemic.
The drastic difference highlights how difficult it is to keep track of even basic metrics like deaths when a deadly disease is raging. The higher toll also means the ripples of the pandemic have spread wider than realized, particularly for health workers on the front lines who have repeatedly faced the onslaught with limited medical resources and personal protection. And the undercounts have important consequences for how countries allocate resources, anticipate future hot spots, and address health inequities.”
https://www.vox.com/22422794/covid-19-death-numbers-total-us-vaccine-ihme