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COVID vaccines cut the risk of transmitting Delta — but not for long

People who receive two COVID-19 jabs and later contract the Delta variant are less likely to infect their close contacts than are unvaccinated people with Delta.
  1. Smriti Mallapaty

    1. Smriti Mallapaty is a senior reporter in Sydney, Australia.

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The first study to look directly at how well vaccines prevent the spread of the Delta variant of SARS-CoV-2 brings good news and bad.

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doi: https://doi.org/10.1038/d41586-021-02689-y

References

  1. Eyre, D. W. et al. Preprint at medRxiv https://doi.org/10.1101/2021.09.28.21264260 (2021).

  2. Brown, C. M. et al. MMWR Morb. Mortal. Wkly. Rep. 70 1059–1062 (2021).

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  3. Chia, P. Y. et al. Preprint at medRxiv https://doi.org/10.1101/2021.07.28.21261295 (2021).

  4. Shamier, M. C. et al. Preprint at medRxiv https://doi.org/10.1101/2021.08.20.21262158 (2021).

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