The SMART Health Card is voluntary and minimal by design to protect personal information. About 80 percent of vaccinated people in the U.S. most likely have access to it.

Whether they realize it or not, about 200 million people in the United States now likely have access to a Covid-19 digital vaccine card.

The digital pass known as the SMART Health Card is voluntary and minimal by design to protect personal information. It has a person’s name, date of birth and the dates and brands of vaccination doses, all contained within a type of scannable bar code known as a QR code.

And after a relatively quiet start, it has built momentum in recent months as more states and companies have signed on, making it something of a de facto national digital vaccine card.

https://www.nbcnews.com/tech/tech-news/national-covid-vaccine-card-quietly-emerged-rcna11678