Get it laminated and stick it in your wallet. That's what I did. There will come a time when you might need it.
So far I don’t see a use for vaccination card. Maybe state governors might have a use but Federal government southern border is wide open anybody can come in with any disease so why would they care if citizens are carrying vaccination cards? Lol. I’ll keep the card but imo becomes more and more useless each day as more and more people are vaccinated. Getting close to herd immunity then on to the next variant vaccination just like the flu. Always been people that don’t get vaccinated nothing new with that.