This is a remix of the wonderful Convention badge holder by Jurgizmo that I definitely recommend you check out! - https://www.thingiverse.com/thing:491108
I took the design and made some adjustments to the geometry and finish to allow for a standard US CDC sized Vaccination card to rest in. The original badge holder hole is now being used as a locking stop with a part I made to slip on over the top after you have placed your card inside. There is room for your card and a piece of thin sheet plastic (you can use a recycled food container or any sheet plastic cut to size). If your Vaccine card has been laminated it should also fit (Note: make sure to trim the lamination to fit).
For bonding the top and bottom half it is recommended to use superglue or 5 min epoxy. I really like the 5 min epoxy as it added more strength to the parts which are pretty thin so its not so bulky. The end clip is a press fit and you may want to print extras (I included two versions to accommodate laminated cards).
*I also added a great reference image from the replica prop forums on the components that make up a multipass if you need it for reference.
Printing Notes:
Be safe, get vaccinated, and don't forget to wear a mask even after you have your Multipass filled out!
The author hasn't provided the model origin yet.