Diseases, Conditions, Syndromes

EU countries prolong COVID-19 certificates amid rising cases

European Union countries approved Tuesday extending the use of COVID-19 certificates by one year until the end of June 2023 as cases of the deadly virus start to grow again ahead of the summer holiday season.

Diseases, Conditions, Syndromes

COVID mortality age patterns changed significantly during pandemic

Early in the pandemic, older populations in the United States suffered the greatest death toll from COVID-19. But Penn demographers Irma Elo and Samuel Preston, with Boston University's Andrew Stokes and others, wanted to ...

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