This YouTube video may give you the answers you’ve been looking for to understand what Health Cards (e.g., New York’s Excelsior Pass) are, and how they can be used in various businesses. Health Cards are easily retrievable using your mobile phone with an app. At this writing, more than 20 states—including Connecticut, Nevada, Hawaii use Health Cards.

Find out more at the sources below:
Source: How Does the COVID SMART Health Card Work? (verywellhealth.com)

https://epass.ny.gov/home