Let’s Call! Using the Phone to Increase Acceptance of COVID-19 Vaccines

Using the Phone to Increase Acceptance of COVID-19 Vaccines

Project Info

Principal Investigators

Pedro C. Vicente (Nova SBE)
Alex Armand (Nova SBE)
Mattia Fracchia (Nova SBE)

Field Coordinator

Frederica Mendonça
Simão Paiva


International Growth Centre (IGC)

About this Project

Vaccinating against COVID-19 is the main hope to end the current pandemic.
We surveyed by phone, in two separate waves, two samples from previous large-scale randomized field experiments: a) household heads from 206 communities in the province of Cabo Delgado, from Armand et al. (2020); b) microentrepreneurs from 13 formal and informal urban markets in the Greater Maputo, from Batista, Sequeira, and Vicente (2021). We develop and test experimentally three phone-based cumulative interventions to increase COVID-19 vaccine acceptance in Mozambique. First, the provision of a simple positive message informing about these vaccines. Second, the activation of social memory on the country’s success in eradicating wild polio. Finally, the inoculation against fake news by developing among participants a critical view towards misleading information. We find that the combination of the three interventions increases COVID-19 vaccine acceptance and trust in institutions.

Read the IGC blog post here.

Read the Working Paper here.

Watch the video 

Contributing to SDGs: