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. 2022 Jan 28;22(5):649–656. doi: 10.1016/S1473-3099(21)00813-6

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Influence of time since complete vaccination on rates of SARS-CoV-2 infection and severe COVID-19 illness

Estimates based on the cohort of 5 351 085 individuals who received complete vaccination from January to July, 2021. The figure reports the trends in age-period-cohort modelled incidence rates (and 95% CI bands) according to time since complete vaccination. Estimates are adjusted for the month of vaccine completion (cohort effect), and the month of outcome occurrence (period effect).