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Available for over a year

There’s been encouraging news about the Oxford Covid-19 vaccine from a trial involving about 1,000 people. Before further trials show that it is effective, how great would the challenge be in scaling up from making a few thousand doses of the vaccine to manufacturing two billion by the end of this year? Sandy Douglas of Oxford’s Jenner Institute explains how they plan to mass-produce the vaccine safely given the speed and magnitude of the scale up. Photo: Plastic containers of a Covid-19 test vaccine Credit: Press Association