LAS VEGAS — A newly-launched tool by Nevada state officials gives digital access to their COVID-19 vaccination records through QR codes. SMART Health QR Code uses data stored in Nevada WebIZ, the ...

This little QR code is a lot more powerful than it looks. It helps collect data about your travel history, health status and more -- and China's using it to track citizens and stop those infected with ...

MEXICO CITY, Nov 25 (Reuters) - Mexico City has launched a test-and-trace approach to containing the coronavirus, after a rise in hospitalizations that has raised fears of a new economic lockdown in ...