As I told you some weeks ago, we have an ongoing 'experiment' in Belgium, with the three main jurisdictions having quite distinct vaccination rates. Flanders has about 78% fully vaccinated people (total population), Wallonia ca. 68%, and Brussels only 51%.
Below is a graph with the cases per 100,000 inhabitants per 2 weeks on the Y-axis, and the unvaccinated % of the population on the X-axis. There is a clear trend, and also a clear distinction between the three parts of the country. Also, more restrictions have been upheld in Brussels and partly in Wallonia. So Flanders has the least restrictions, but also the least amount of cases.
Vaccination doesn't help only yourself, it clearly also helps stop covid spread.