Apparently, this card will have stored information about the type of vaccine the user has had, the number of doses, the dates when the doses were administered, the canter where the doses were administered and any other future appointments.
For those unvaccinated, but with a Covid test, the vaccine card will include the name of the test performed, the type of the test, the date when the result was receives and the healthcare unit or entity where the test was taken.
Google declared that all vaccine information will be stored into the device and that the information will be available even when the device does not have access to internet, in offline mode. Those who are interested in using the vaccine card need a device that runs with Android 5 version or a later one.
No copies of any of the information inside the Android device are to be stored by Google and no third party will benefit from the stored information. However, the American multination company will know how many times the Android user has used the card and when.