My two cents on laminate vs. do not laminate discussions:

I keep my original vaccination certificate card stored safely at home. I made an exact two sided copy and laminated that exact copy to carry around with me.

When it becomes necessary to get a follow up shot I will take the original non-laminated certificate with me and then copy and laminate the new version to cary around with me while my updated original card rests safely at home.

...best of both worlds LOL