Do you know where your Covid-19 vaccine card is? If not, you may want to track it down, because getting a new one could be tricky.

The US Centers for Disease Control and Prevention is no longer distributing the white cards that were given out with Covid-19 vaccines earlier in the pandemic, according to the agency’s website.

The CDC notes that it does not keep vaccination records and says recipients should contact their state health department’s immunization information system (IIS) if they want to keep track of their Covid-19 shots.