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Updates & Corrections
Update 10 August 2021: This story has been updated with additional detail about the Delta variant and about what makes the findings valuable.
Abu-Raddad, L. J. et al. Preprint at medRxiv https://doi.org/10.1101/2021.08.02.21261465 (2021).
Jassat, W. et al. Lancet Glob. Health https://doi.org/10.1016/S2214-109X(21)00289-8 (2021).