People weakest link for apps tracking coronavirus exposure

The app builders had planned for pranksters, ensuring that only people with verified COVID-19 cases could trigger an alert. They�d planned for heavy criticism about privacy, in many cases making the features as bare-bones as possible. But, as more states roll out smartphone contact-tracing technology, other challenges are emerging. Namely, human nature. The problem starts with downloads. Stefano Tessaro calls it the �chicken-and-egg� issue: The system works only if a lot of