HINES, ILLINOIS - APRIL 01: Army veteran Robert Hall waits the recommended 15 minutes to see if he will have any adverse reactions after receiving his second COVID-19 booster shot at Edward Hines Jr. VA Hospital on April 01, 2022 in Hines, Illinois. Earlier this week the CDC updated its recommendations to encourage a second COVID-19 booster shot for certain immunocompromised individuals and people over the age of 50 who received an initial booster dose at least 4 months ago. (Photo by Scott Olson/Getty Images)

LONDON (AP) — The World Health Organization is estimating that nearly 15 million people were killed either by the coronavirus or by its impact on overwhelmed health systems in the past two years. That is more than double its official death toll. The U.N. health agency says most of the fatalities were in Southeast Asia, Europe and the Americas. In a report released Thursday, WHO chief Tedros Adhanom Ghebreyesus describes the figure as “sobering.” Accurate numbers on COVID-19 deaths have been problematic throughout the pandemic, as the figures are only a fraction of the devastation wrought by the virus. That is largely due to limited testing and the differences in how countries count COVID-19 deaths.