How Covid turbocharged the QR revolution

Quick Response (QR) codes have become a popular way to conduct contactless business, and even contact tracing, during the coronavirus pandemic. Restaurants and retail stores allow customers to order and pay by scanning the codes with their smart devices, which pulls funds from payment accounts like PayPal, or their bank account, debit, or credit card. Public health agencies in the UK display QR codes that people can scan to “check in” and if someone tests positive for Covid-19 at that location people who scanned the code within 21 days are notified. QR codes hold massive amounts of data reliably and cheaply.

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