When will a Covid-19 vaccine be ready in the UK? – The Times

There are perhaps half a dozen people in the world who have any idea how the most important scientific trial in Britain this century is going. And even they dont know the most important piece of information in it.
But one day soon, they will have enough data. They will have noted that 150, or maybe even fewer, of the 20,000 volunteers involved in the Oxford vaccine trial have been symptomatically infected by the coronavirus. It will be time to start assessing whether it works sufficiently well …

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