[knak]

West also makes this:

Clip'n'Ject™ is a trademark of West Pharmaceutical Services, Inc. The Clip'n'Ject™ system from West Pharmaceutical Services offers the promise of safer, easier and more convenient drug reconstitution. The system consists of a plastic connector that links a syringe prefilled with a diluent to a standard vial.

Clip'n'Ject™ is convenient. The single-package system includes a prefilled syringe, the drug vial and an alcohol swab. The packaging is designed to maintain sterility.

[DannyTN]

"West also makes this:"

That looks like a "nice to have", to me. I don't think it would be much of a setback to any vaccination program to not have that.