A variety of digital and old-fashioned approaches are being used to confirm vaccination for entry to public places. But the world is still far from a universal standard of proof for crossing borders.

By Heather Murphy

“In some parts of the world, vaccine proof has gotten people a range of goods: free popcorn and ice cream, and even discounted beers. But for the most part, they have just allowed people to post selfiesor to reassure their acquaintance. Some governments are looking for more formal systems that work on phones and counter fraud. Here is a look at some early efforts.“

Source: The New York Times