RIO DE JANEIRO, BRAZIL - Inspired by China's successful practice of fighting the pandemic, Mexico's capital is relying on QR codes and smartphones to identify close contacts of COVID-19 patients and break the chains of infection, according to local authorities.
Since November 18th, QR codes have been posted at establishments with frequent foot traffic in Mexico City, including banks, restaurants and shops, forming a rapid-response network to notify those potentially exposed to the coronavirus.
Given the program's early-stage success, authorities have decided to expand the scheme to pharmacies, supermarkets and self-service stores, as well . . .