In Sierra Leone, Covid-19 vaccine demand lags supply. To increase demand for Covid-19 and other vaccines, this research team is partnering with Sierra Leone’s Ministry of Health and Sanitation (MoSH) and Development Media International (DMI) to investigate two complementary approaches to encourage vaccination. Researchers will experimentally evaluate the relative efficacy of trainings on vaccine literacy and detection of inaccurate health information against a control condition among unvaccinated social media users in Freetown. Study outcomes include vaccination uptake, inaccurate health information discernment, demand for formal health information, and vaccine knowledge. Additionally, online (WhatsApp) and offline (in-person) social network information will also be elicited to assess how the interventions impact information-sharing within networks.