Fig. 4

Results from sensitivity analyses. Univariable sensitivity analysis dimensions: (top) time horizon; (bottom) vaccine efficacies. In each panel, a total of 972 data points (27 countries × 36 vaccine roll-out scenarios) have been allocated into each cell based on value, with colours indicating the overall count of data points in that cell. In the bottom right panel, for example, the dark cell on the top right indicates there are approximately 500 country-and-vaccine-roll-out-scenario combinations where the ICER relative to GDP per capita is greater than one in both the baseline analysis and when low vaccine efficacies were implemented. Deviations from the diagonal line indicate there are country-and-vaccine-roll-out-scenario combinations returning different results in terms of ICERs as proportions of GDP per capita resulting from the univariable sensitivity analysis