‘Mix and match’ UK Covid vaccine trial expanded
Using different shots for the first and second doses might give better protection, say experts. …
He told the BBC: “It’s practically going to have to be that way because, once you’ve completed a course of, say, the Moderna or Pfizer or the AstraZeneca, with two doses – in the future, it’s going to be quite difficult to guarantee you get the same type of vaccine again.”
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