After the Pfizer vaccine breakthrough, immunologist Dr Al Edwards tells Theodora Louloudis why the hard work isn't over even once a vaccine is approved, why talk of effective immunisation before Christmas is premature and how this particular vaccine could be particularly difficult to distribute.

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Read Sarah Newey 'We should be concerned about the 'mink virus', but not for the reasons you think': https://bit.ly/3lu966w |

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