Pfizer and Moderna Covid vaccines give best overall boost, UK trial finds
- boosters were given about three months after second doses of AstraZeneca or Pfizer, which is the gap now recommended in the UK.
All seven vaccines boosted immunity when given after two doses of Oxford-AstraZeneca, and six were effective following two doses of Pfizer - but some worked better than others. In people who had received two doses of AZ, the study found a 30-fold rise in antibody levels after a Moderna booster, and a 25-fold rise after a Pfizer booster.
On protection against hospitalisation and death from Omicron, Prof Faust said he hoped it "would remain intact" and "be handled by current vaccines".
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