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. 2022 Jun 30;16(6):1004–1013. doi: 10.1111/irv.13024

FIGURE 1.

FIGURE 1

Cumulative incidence of confirmed COVID‐19‐cases and COVID‐19 vaccinations in Norway, January–October 2021, and timing of the residual sera collection. Incidence of cumulative infections (in dark blue) from Beredt C19 and frequency of COVID‐19 vaccinations (first dose in green and second dose in blue) from the Norwegian Immunisation Registry (SYSVAK). The collection period for sampling of residual sera (July 19–September 12) in the present study is indicated with vertical lines. The shaded area shows the period when 85% of the samples were collected.