Figure 1.
Vaccine effectiveness against hospitalisation due to COVID-19 in 65–79 and ≥ 80-year-olds, in overlapping 8-week-wide observation intervals, based on pooled estimates from Denmark, Navarre (Spain), Portugal and Norway, 1 October 2021‒28 March 2022a
CI: confidence interval; COVID-19: coronavirus disease; VE: vaccine effectiveness.
a The values of VE were obtained by pooling VE estimates from Denmark, Portugal, Navarre (Spain) and Norway using random-effects meta-analysis. The supplementary material includes numbers supporting VE calculations (Supplement S2. Events and person-months), as well as the sample size per period and site (Supplement S3. Detailed site estimates).
In the graph, each VE figures as a dot, which is overlapped by a vertical line representing the respective 95% CI.
