Austria has a around 60% vaccination rate² and around 12% of the population had an documented infection³.
Herd immunity is a discussion point but scientists are undecided how high the numbers need to be. Estimates from earlier this year did talk about 60% but this number was raised and some experts even say its impossible.
2: https://orf.at/corona/daten/impfung
3: https://graphics.reuters.com/world-coronavirus-tracker-and-m...