Effectiveness of a UVC air disinfection system for the HVAC of an ICU Susana Oliveira de Souza, Antônio Américo Cardoso Jr, Aquiles Sales Craveiro Sarmento and Francesco d’Errico Eur. Phys. J. Plus, 137 1 (2022) 37 Published online: 18 December 2021 DOI: 10.1140/epjp/s13360-021-02240-y