To prove you've had the vaccine you'll need a special mark on your forehead or hand...
Correct and that’s why all the “new” single dose vaccine injectors are individually coded and have an app attached to the code to report who has been vaccinated, the date, and where.
America’s Military Vaccine Mandate? Dept. of Defense Purchasing 500 Million ApiJect Syringes to Inject Every Person in America with Coronavirus Vaccine
The ApiJect syringes come with an optional RFID tag so that health care workers can track the GPS location and identity of the individual being injected. Via the Apiject.com website:
With an optional RFID/NFC tag on each BFS prefilled syringe, ApiJect will make this possible. Before giving an injection, the healthcare worker will be able to launch a free mobile app and “tap” the prefilled syringe on their phone, capturing the NFC tag’s unique serial number, GPS location and date/time. The app then uploads the data to a government-selected cloud database. Aggregated injection data provides health administrators an evolving real-time “injection map.”