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Fourth dose of COVID vaccine offers only slight boost against Omicron infection

Israeli trial shows a fourth vaccination raises antibody levels but provides little extra protection against SARS-CoV-2 infection.
  1. Smriti Mallapaty
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A fourth dose of a COVID-19 vaccine restores antibodies to levels observed after the third dose but provides only a modest boost in protection against infection, according to a small trial carried out in Israel1.

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doi: https://doi.org/10.1038/d41586-022-00486-9

References

  1. Regev-Yochay, G. et al. Preprint at medRxiv https://doi.org/10.1101/2022.02.15.22270948 (2022).

  2. Bar-On, Y. M. et al. Preprint at medRxiv https://doi.org/10.1101/2022.02.01.22270232 (2022).

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