Human rights groups and researchers have raised concerns in Brazil that social media platforms are failing to effectively police disinformation ahead of a highly polarized presidential vote on Sunday.
Brazil's Superior Electoral Court (TSE) bolstered measures this month to tackle disinformation around the election, especially on video sharing platforms. Sunday's runoff vote pits far-right President Jair Bolsonaro against leftist former President Luiz Inacio Lula da Silva.
