Just to follow on from the question of source, I did try but was unable to complete the chain of numerous people who sent the image to each other before it arrived at the group. So, I suppose we cannot say with certainty it is a real image. But it certainly looks amazing and even if it has been created to serve as propaganda, I am happier to stand behind this than the mainstream propaganda!
RE: In the face of mandatory vaccines the people of Vienna stand united!