Narrative review of the immune response against coronavirus: An overview, applicability for SARS-COV-2, and therapeutic implications Alberto García-Salido;

Differential clinic in children infected by SARS-CoV-2, traceability of contacts and cost-effectiveness of diagnostic tests: Cross-sectional observational study Antia Fiel-Ozores; María Luisa González-Durán; Reyes Novoa-Carballal; María del Mar Portugués-de la Red; Isabel Fernández-Pinilla; Jorge Julio Cabrera-Alvargonzález; Cristina Martínez-Reglero; Sonia Rey-Cao; Ana Concheiro-Guisán;

Impact of the COVID-19 pandemic on emergency department: Early findings from a hospital in Madrid Miguel Ángel Molina Gutiérrez; José Antonio Ruiz Domínguez; Marta Bueno Barriocanal; Begoña de Miguel Lavisier; Rosario López López; Julia Martín Sánchez; María de Ceano-Vivas la Calle;