:::success ### Archiving notice Since their introduction in early 2020, [COVID-19 vaccines have saved at least 1.4 million lives in Europe alone](https://www.who.int/europe/news/item/16-01-2024-covid-19-vaccinations-have-saved-more-than-1.4-million-lives-in-the-who-european-region--a-new-study-finds). Worldwide, more than 12 billion doses of the vaccines have been administered as of March 2024, and [between 14 and 20 million lives have been saved](https://www.ema.europa.eu/en/human-regulatory-overview/public-health-threats/coronavirus-disease-covid-19/covid-19-medicines/covid-19-vaccines-key-facts). In light of this success and the generally high vaccination uptake in most countries around the world, we have decided to discontinue updating of this wiki. The existing material may be of interest for archival reasons and will remain accessible, but not further updates will be undertaken. If you have any questions about the wiki or the Handbook, please [contact the authors](mailto:contact@scibeh.org). :::