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TikTok is China's digital version of fentanyl. This is a warning from a member of the Federal Communications Commission in the US who wants it banned in America.
The video sharing app has been downloaded more than 3 billion times, making it bigger than Facebook, Instagram, YouTube, Snapchat and almost every other social media app.
Shalini Kantayya is a documentary filmmaker who takes a long hard look at the geopolitics, cultural influence and algorithmic bias of the app that delivers three-minute videos so many teenagers have become addicted to. The documentary is called TikTok Boom.