Comparative severity of COVID-19 cases caused by Alpha, Delta or Omicron SARS-CoV-2 variants and its association with vaccination Elena Varea-Jiménez; Esteban Aznar Cano; Lorena Vega-Piris; Elena Vanessa Martínez Sánchez; Clara Mazagatos; Lucía García San Miguel Rodríguez-Alarcón; Inmaculada Casas; María José Sierra Moros; Maria Iglesias-Caballero; Sonia Vazquez-Morón; Amparo Larrauri; Susana Monge;

La vacuna frente a la COVID-19 y la confianza institucional Fermín Jesús González-Melado; María Luisa Di Pietro;

Screening for Crimean-Congo Haemorrhagic Fever Virus antibodies in humans living in an endemic area of Spain Helena Miriam Lorenzo Juanes; Montserrat Alonso-Sardón; Belen Vicente; Beatriz Rodríguez Alonso; Amparo López-Bernus; Josue Pendones Ulerio; Rufino Alamo Sanz; Antonio Muro; Juan Luis Muñoz Bellido; Moncef Belhassen-García;