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Facebook, WhatsApp Step Up Efforts in Brazil’s Fake News Battle

An employee works inside the "war room" ahead of Brazil's runoff election at Facebook Inc. headquarters in Menlo Park, California, on Oct. 17. 

An employee works inside the "war room" ahead of Brazil's runoff election at Facebook Inc. headquarters in Menlo Park, California, on Oct. 17. 

Photographer: David Paul Morris/Bloomberg

Facebook Inc and its messaging app WhatsApp are trying to crack down on the spread of misinformation, spam and fake accounts on social media ahead of Brazil’s election runoff, according to two company representatives.

Monica Guise, Facebook’s public policy manager for Brazil, told reporters at a press conference in Sao Paulo that the company is trying to weed out "bad actors" to reduce misinformation and to help users spot "bad-quality" content.