Links to the video and other articles can be found in the comments.
Remember, this isn't about health, it's about control. If you don't understand that, the placebo's won't make sense.
https://www.reddit.com/r/conspiracy/comments/r0yc2u/is_this_true/

This is the source of information: https://hotcopper.com.au/threads/scandal-in-slovenia.6437642/
This is the video they talk about: https://www.facebook.com/stoplaznivimmedijem/videos/190515176301913/
Woman is not head of Slovenia vaccine program, she is the Head Nurse of a hospital in Ljubljana (capital of Slovenia). My Slovenian is extremely poor (I lived there for half a year 25 yrs ago and have forgotten most of it), but I believe she does not mention anything about placebo injections. She also does not show any vaccine vials as claimed in hotcopper post from where this originates. This is an extremely sloppy justification - persons who created hotcopper post (a) don't know any Slovenian, and (b) could not be bothered to watch the video which doe snot show vaccine vials.
It would be nice if persons spreading conspiracy theories would spend some time investigating, and perhaps learning a few other languages...otherwise no one will believe when they point out real conspiracies.