One thing to keep in mind: if everything is in the same handwriting (including vaccination records that are supposed to be made several weeks apart) it's going to look very suspicious. It's unlikely at hospital of even modest size that the same nurse would administer a vaccine to the same person three weeks apart.
How about real ones?
https://kotakuinaction2.win/p/12i3pupBBQ/fake-cdc-vaccine-id-cards-being-/c/
Linked in a comment
Edit: there's also an image link of examples of filled out cards there
Arigatoni Godzillamassu senpai
One thing to keep in mind: if everything is in the same handwriting (including vaccination records that are supposed to be made several weeks apart) it's going to look very suspicious. It's unlikely at hospital of even modest size that the same nurse would administer a vaccine to the same person three weeks apart.
I doubt they'll look closely enough for that to matter but if you're worried just have a friend of family member write one of the lines.