Pediatric research in Spain: Challenges and opportunities Laura Moreno-Galarraga; Cesar Gracía Vera; Irene Rivero-Calle; Federico Martinón-Torres; Ignacio Diez López; Fernando Cabañas; Cristina Calvo;

Invasive bacterial infections in febrile infants younger than 3 months old after SARS-CoV-2 pandemic Leire Bizkarra-Txurruka; Ainara Lejarzegi; David Andina; Borja Gomez; Santiago Mintegi;

Current epidemiological situation of Streptococcus pyogenes infections Cristina Calvo; Jesús Saavedra Lozano;