A Chinese subway system’s attempt to spread some Lunar New Year cheer backfired over the weekend, as panicked passengers mistook seasonal red QR codes for positive Covid tests. Chinese social media ...

Liu, a 39-year-old tech worker in Beijing, arrived in the central city of Zhengzhou on Sunday with all the boxes ticked to travel under China’s stringent Covid restrictions. He had tested negative for ...

These days, it's easy for anyone to take out their phones and scan a QR Code to see a food menu or to pay a bill. But QR Codes can also make it easy for scammers to access your personal information.

Among the many changes brought about by the pandemic is the widespread use of QR codes, graphical representations of digital data that can be printed and later scanned by a smartphone or other device.