Trends in child and adolescent mental health in Catalonia in the context of the COVID-19 pandemic during the 2020¿2021 school year Elena Alcover Bloch; Anna Gatell Carbó; Josep Vicent Balaguer Martínez; Tomás Pérez Porcuna; Olga Salvadó Juncosa; Emilio Fortea Gimeno; Patricia Álvarez Garcia;

Clinical characteristics and mortality risk factors in patients aged less than 18 years with COVID-19 in Mexico and Mexico City Rosa María Wong-Chew; Daniel Ernesto Noyola; Antonio Rafael Villa;

Epidemiology, management and risk of SARS-CoV-2 transmission in a cohort of newborns born to mothers diagnosed with COVID-19 infection Gonzalo Solís-García; Ana Gutiérrez-Vélez; Isabel Pescador Chamorro; Elena Zamora-Flores; Sara Vigil-Vázquez; Elena Rodríguez-Corrales; Manuel Sánchez-Luna;