One day Long Covid in children could be objectively diagnosed with a blood test, thanks to the help of Artificial Intelligence (AI). In fact, a study by the Università Cattolica del Sacro Cuore, Rome campus – Fondazione Policlinico Universitario Agostino Gemelli IRCCS and the Ospedale Pediatrico Bambino Gesù IRCCS, has highlighted the molecular signature of Long Covid in plasma in pediatric age and used an AI tool capable of making the diagnosis based on the results of the blood sample, with 93% accuracy.