Dr. Lucy Jessop:

Regarding where they are manufactured, all the vaccines we have are from EMA-approved manufacturing sites. They are manufactured in several different countries but they go through very rigorous procedures to recognise those sites as able to produce vaccines. Each of the vaccines has lots of batch checking to make sure that all the vaccines in each batch that comes out are of equal effectiveness. If there are any batch problems then, obviously, those batches are held back or additional tests are done. In terms of the batches we get, I do not think it makes any difference which country they come from. All of the batches from that manufacturer have gone through the same rigorous testing.