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How do vaccinated people spread Delta? What the science says

Emerging data suggest that Delta could spread more readily than other coronavirus variants among people vaccinated against COVID-19. But key questions remain.
  1. Nidhi Subbaraman
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When early field data showed that vaccinating people cuts transmission of the SARS-CoV-2 virus, researchers were cautiously optimistic. But they warned that many of those studies, although promising, took place before the fast-spreading Delta variant proliferated worldwide. Now, reports from various countries seem to confirm what scientists feared after the variant tore through India with alarming speed in April and May: Delta is more likely than other variants to spread through vaccinated people.

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Nature 596, 327-328 (2021)

doi: https://doi.org/10.1038/d41586-021-02187-1

References

  1. Riemersma, K. K. et al. Preprint at medRxiv https://doi.org/10.1101/2021.07.31.21261387 (2021).

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

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  3. Musser, J. M. et al. Preprint at medRxiv https://doi.org/10.1101/2021.07.19.21260808 (2021).

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

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