I guess it’s interesting but this seems to have minimal use case. For those with reactions to injections and such it’s useful, but it seems much easier to use a needle in most cases. Also that article claims that it “doesn’t damage the skin”, but I don’t see why a vaccine would cause any meaningful damage to the skin in the first place.
Edit: Okay I’m seeing now how this would be useful for more frequent injections like insulin and such if it can be used like that.
Lol yeah when I get vaccinated the anxiety fully fades the moment the needle enters my arm.