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So your first dose may be astrazeneca and your second one would be pfizer. in terms of roll—out for the uk, there will be no change in policy at the moment, but these results have a lot of impact for the global relapse of these vaccines. when at the combination you use them as long as he felt that doses, the two recommended doses. it seems to be offering really good protection. thats very important for countries that happens that is big access as we have at the moment to vaccines. thank you ve...