> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://wissensbot.ceva.de/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Wie lange hält die Immunität bei Circovac an?

* **Ferkel:** mindestens **23 Wochen**
* **Passiv via Kolostrum** (nach Impfung der Muttersauen): **bis zu 5 Wochen**