- consider using {collapse} to summarise data
- update population estimates up to 2022
- modify code to use new estimates (data structure has changed somewhat)
- re-check the Wikipedia source for vaccine arrival data
- see if it is possible to extract also info from the special vaccination campaings
- change doses summary scripts to use duckdb
- include bivalent dosis (dosis #5, PFIZER, started 2023-01-01)