Brown, Dan https://orcid.org/0009-0000-6694-4539
Barrera, Adelaida https://orcid.org/0009-0003-5682-4279
Ibañez, Lucas
Budassi, Iván https://orcid.org/0009-0008-1096-4061
Murphy, Bridie
Shrestha, Pujen
Salomon-Ballada, Sebastian
Kriscovich, Jorge
Torrente, Fernando https://orcid.org/0000-0001-7470-6979
Funding for this research was provided by:
Vaccine Confidence Fund
Inter-American Development Bank
INECO Foundation
Article History
Received: 26 November 2023
Accepted: 13 August 2024
First Online: 18 October 2024
Competing interests
: The authors declare the following financial competing interests: D.B., A.B., B.M., P.S. and S.S.-B. were employed by the Behavioural Insights Team, L.I. was employed by ECOM, and F.T. was employed by INECO. I.B. was employed by the federal government of Argentina, and J.K. was employed by the Ministry of Health in Chaco province. The local government’s role in the project was to provide access to the phone number databases from which participants were recruited for the trial, and to provide permission to implement the project.