Cost of universal immunization with Nirsevimab vs. standard of practice for infants in their first RSV season. Foggia District, Italy, 2023-2024.

This study assessed the direct costs of using Palivizumab for RSV prevention in the Foggia District, Italy, during the 2023/2024 season, and explored the cost savings coming from reallocating resources to Nirsevimab in a universal RSV program. Switching from Palivizumab to Nirsevimab could protect 57.85 % of newborns per season. Considering also hospitalization expenses, coverage reaches 46.4 % of infants, or 66.2 % if unspecified bronchiolitis is included. These results suggest notable cost savings and greater coverage, supporting a universal RSV initiative.