The influence of COVID-19 on the practice of physical activity in the European Union countries Diego Álvarez-Lourido; José Luis Paniza-Prados; Antonio Álvarez-Sousa;

Estimación retrospectiva de los casos iniciales de COVID-19 en Santiago Región Metropolitana en Chile Jenny Márquez; David García-García; María Isabel Vigo; César Bordehore;

Unequal impact of COVID-19 on excess deaths, life expectancy, and premature mortality in Spanish regions (2020-2021) Nazrul Islam; Fernando J. García López; Dimitri A. Jdanov; Miguel Ángel Royo-Bordonada; Kamlesh Khunti; Sarah Lewington; Ben Lacey; Martin White; Eva J.A. Morris; María Victoria Zunzunegui;