Some destinations, cruise lines and major sports venues are already requiring travelers to provide proof that they have been fully vaccinated against Covid-19. Other businesses, like Krispy Kreme, are offering freebies and other perks to people who can prove they’ve been inoculated.

If you are among the 48 million Americans who have been fully vaccinated against Covid-19, the only proof that you have received your Covid shots is typically your paper vaccination record card with the CDC logo in the upper corner…

All Covid-19 vaccination providers are required to report data within 72 hours in their state’s immunization system, so there should be a back-up record of your vaccination status there. The CDC has a list of the Immunization Information System (IIS) in each state, which is where to start if you need a replacement card and either can’t remember where you were vaccinated or have difficulty contacting the facility.