Widespread Covid-19 vaccination not expected until mid-2021, says WHO

Widespread vaccinations against Covid-19 are not expected until the middle of next year, according to the World Health Organization, which has stressed the importance of rigorous checks on their effectiveness and safety. 'This phase 3 must take longer because we need to see how truly protective the vaccine is and we also need to see how safe it is,' said spokeswoman Margaret Harris, referring to vaccine clinical trials

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