Unless otherwise stated, national-level case and deaths data come from the European Centre for Disease Prevention and Control.
Data for the US its territories come from the Covid Tracking Project.
UK deaths data after January 28 come from the UK Department of Health and Social Care, including its revised time series after March 6. On July 2, the UK’s methodology for reporting positive cases changed to remove 30,302 duplicates identified when combining testing data from hospitals (“pillar 1”) and private sector labs (“pillar 2”). Prior to this date, the UK case data are the sum of the revised totals published by Public Health England, Public Health Scotland, Public Health Wales, and the Northern Ireland Department of Health.
Deaths data for Spain before July 3 come from revisions published by the Spanish Ministry of Health. 209 deaths that could not be attributed to a specific date have been distributed uniformly across the remaining distribution.
The data for Chile, China, France, India as well as for the US states of New York and New Jersey have been adjusted to redistribute additional cases or deaths that were added after they occured in proportion to the previous distribution of deaths or cases in that jurisdiction.
The full excess mortality dataset used for this analysis is freely available for download on Github. It is compiled from data originally produced by official statistics agencies or civil registries in each of the jurisdictions mentioned. The full list of sources is also available on our Github repository.
Help us improve these charts: Please email William Rohde Madsen, Caroline Nevitt, Alan Smith, Martin Stabe, Cale Tilford and Aleksandra Wisniewska. Edited by Adrienne Klasa
Corrections: Due to a typographical error, the first paragraph of this story incorrectly stated the number of people who had died from Covid-19 for several hours on April 9. At the time, that figure should have read 87,741. Due to a typographical error, a map on this story temporarily showed an incorrect number of deaths from Covid-19 in Italy on May 14. At the time, that figure should have read 31,106.