The use of social media as an influence on vaccination rates: A systematic review protocol - Juliana Iscarlaty Freire de Araújo; Francisco de Assis Moura Batista; Marilia Rute De Souto Medeiros; Bárbara de Oliveira Sena; José Adailton da Silva; Fábia Barbosa de Andrade (PLoS ONE, 2025)