Welcome to the XV Catalan Congress of Clinical Laboratory Sciences in Alp, La Cerdanya, organized by the Catalan Association of Clinical Laboratory Sciences (ACCLC).After two years of pandemic in which the professionals of the Clinical Laboratories have been at the forefront contributing to the fundamental role of the health system, we are looking forward to being able to hold another face-to-face conference with current issues within our field.We are very excited to be able to share this space of interrelation, debate, reflection, with scientific objectivity and commitment to the Catalan language, with all of you.We have chosen La Cerdanya, a beautiful place in our country, to enjoy these three days of meeting. We hope you enjoy it and actively participate in the sessions that the organizing committee has prepared.Thank you all: moderators, speakers, attendees, corporate members, collaborators and organizers, for your involvement!