Funding for this research was provided by:
Italian Ministry of Health (CCM Project)
Received: 12 March 2019
Accepted: 12 September 2019
First Online: 15 November 2019
Ethics approval and consent to participate
: Ethics approval was not required as clinical isolates were collected, processed, and stored as part of routine clinical care by the collaborating hospital laboratories participating in the network. As our study did not involve interventions or additional clinical samples to be collected, no consent to participate was required. The surveillance activities are within the Global Polio Eradication Initiative (GPEI) of the WHO in the “Polio Eradication & Endgame Strategic Plan 2013-2018”, and by the Italian Ministry of Health (ref. 0004114–08/02/2018-DGPRE-DGPRE-P).
: Not applicable. Our manuscript does not contain any individual person’s data in any form, including any individual details, images or videos.
: The authors declare that they have no competing interests.