LOL, and sadly even in the US nurses often "forget" to use filter syringes as required.
I mean look, Spaceman spiff just enjoys taking shots at me, but I can't say he's wrong that any exposure to non-sterile environments is not desirable, including open ampules or syringes, despite being accepted practices in medicine.
I'm confident the net benefit of removing particles, aggregates, and existing bacteria outweighs any, demonstrably small risk from backfilling, etc.
I want to give injecting directly from the filtered syringe a try, but I am concerned about the risk of overshooting. It would simplify things greatly, just put on a new needle for each injection. No other syringes or vials needed,
In the never ending quest, I'm looking for a sterile version of this, which would be the holy grail for controlled dose injections directly from the filtered syringe.