8:28 a.m. ET, January 14, 2021 Covid increased US death rate significantly in second quarter of 2020, according to new CDC data From CNN Health's Jessica Firger A Covid-19 disaster morgue made up of refrigerated trailers stands at the South Brooklyn Marine Terminal in New York, on December 14, 2020. Michael Nagle/Xinhua/Getty Images Covid-19 caused a significant jump in the US death rate in the second quarter of 2020 The age-adjusted all-cause mortality rate was 769 per 100,000 in the first quarter of 2020 and rose to 840 in the second quarter of the year. Comparatively, the death rate for the second quarter of 2019 was 702 per 100,000. The report shows that mortality rose significantly in 2020, but it’s an incomplete snapshot of the pandemic since data for only the first two quarters of 2020 are currently available.