Figures & data
Note: The figure shows daily aggregated data with total unsuccessful campaigns between 1 January 2018 and 24 November 2021 on the left axis, and the total number of new cases both worldwide (237 countries) and in our sample (66 countries). The WHO new cases line marks the beginning of the WHO counting new cases. The Pandemic line represents the WHO declaration of the pandemic with the vaccine delivery line identifying the COVAX announcement.
Supplemental material