Jimmy Lai, Hong Kong media tycoon, is arrested

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The Hong Kong pro-democracy tycoon Jimmy Lai's arrest, on suspicion of collusion with a foreign country, makes him the most high profile arrest so far under the new controversial security law. A legal expert gives an explainer. We're live in Paris as an increase in Covid-19 cases means wearing a face mask will be compulsory in busy parts of the French capital from today. And the World Health Organisation's Regional Director for Africa tells us about the efforts to make sure that people across Africa will have full access to any successful Covid-19 vaccine.