"STIKO" is the acronym of the "Ständige Impfkommission", or "permanent vaccination commission" as the dictionary translates it. They are the office responsible

"STIKO" is the acronym of the "Ständige Impfkommission", or "permanent vaccination commission" as the dictionary translates it. They are the office responsible for recommendation of vaccinations in Germany. A lack of recommendation does not mean that doctors could not vaccinate people anyways. The STIKO has not recommended vaccination of all youths yet (12-17 year old) but only for those at risk for example. Since the vaccines are already approved for that range of age though, some federate states have greenlit doing it in their vaccination centers anyways.