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There's been a dramatic escalation in the row between Facebook and Australia.The social media giant has blocked Australian users from sharing or viewing news. It's all down to a proposed social media law, as we will hear live from Sydney. Freezing temperatures, no power and people burning wooden fences to keep warm. We'll head to the usually hot Texas to find out what's going on and how people are coping And we find out about an experiment to vaccinate all adults in one small Brazilian town to see if it stops Covid-19 in its tracks.