We are grateful to the national institutes and experts for the data and documents

AUSTRIA	BELGIUM	CANADA
The Epidemiological Reporting System (EMS) Federal Ministry Republic of Austria (Social Affairs, Health Care, and Consumer Protection)	Public Health Institute Sciensano	Statistics Canada Public Health Agency The Government of Canada
DENMARK	ENGLAND AND WALES	FRANCE
Statens Serum Institut, Ministère de la santé	Public Health Wales National health Statistics Office National Statistics	Institute of statistic (Insee) Public health France (SpF)
GERMANY	ITALY	JAPAN
Institut Robert Koch (RKI)	Instituto superiore di sanità Ministry of health Civil protection	National Institute of Population and Social Security Research Ministry of Health, Labour and Welfare
NETHERLANDS	NORWAY	PORTUGAL
Institute of public health and environnement (RIVM)	Statistics Norway Folkehelseinstituttet	Diireçao.Geral da Saùde Ministry of Health
REPUBLIC OF KOREA	REPUBLIC OF MOLDOVA	ROMANIA
Korean Centers for diseases Control	Ministry of Health of the Republic of Moldova (MH) National Bureau of Statistics of the Republic of Moldova	Ministry of Health (MH)
SCOTLAND	SPAIN	SWEDEN
National Records of Scotland (NRS) Scottish Government	Ministry of health Institute of health Carlos III	Public Health Agency of Sweden (PHAS) Conseil national de la santé et du bien-être (NBHW)
SWITZERLAND	UKRAINE	UNITED STATES OF AMERICA
Federal Office of Public Health FOPH	Ptoukha Institute for Demography and Social Studies of the National Academy of Sciences of Ukraine	Centers for Disease Control

National experts

We greatly rely on country experts that help us in locating, documenting and accessing various data, understanding their origins, quality, and other important details. We thankfully acknowledge the contributions of the following researchers:

Natalia Bustos Sierra, Sciensano, Belgium
Geneviève Chêne, Public Health France (SpF), France
Viviana Egidi, La Sapienza University of Roma, Italy
Myer Glickman, Office for National Statistics (ONS), UK
Reiko Hayashi, National Institute of Population and Social Security Research, Japan
Fanny Janssen, University of Groningen, Netherlands
Sebastian Klüsener, Federal Institute for Population Research (BiB), Germany
Daria Korotkova, Ptoukha Institute for Demography and Social Studies of the National Academy of Sciences of Ukraine
Lagezentrum COVID-19 Team, Robert Koch Institut, Germany
Yann Le Strat, Public Health France (SpF), France
Ella Libanova, Ptoukha Institute for Demography and Social Studies of the National Academy of Sciences of Ukraine
Jennifer H. Manans, National Center for Health Statistics, Centers for Disease Control and Prevention
Lucas Morin, Clinical Investigation Unit, University Hospital of Besançon ( Inserm CIC 1431), & High-Dimensional Biostatistics for Drug Safety and Genomics, CESP, Paris (Inserm 1018)
Markus Sauerberg, Vienna Institute of Demography, Austria
Paul D. Sutton, Division of Vital Statistics, National Center for Health Statistics, Centers for Disease Control and Prevention
Julie Ramsay, National Records of Scotland (NRS)
Adrien Remund, University of Groningen, Netherlands
François Robin-Champigneul, Associate member of the Actuarial and Financial Sciences Laboratory (SAF), the Institute of Financial Science and Insurance (ISFA), University of Lyon 1, France
Herman Van Oyen, Sciensano, Belgium