In their haste to bring COVID-19 contact tracing apps to market, many developers around the world have skimped on security, giving hackers easy targets from which they can steal all kinds of sensitive information, such as the names of the sick, national ID numbers, location data, and more. Countries have been deploying the tracking apps in an effort to identify disease hotspots and limit the spread of the virus while they ease lockdown orders. Qatar, India, the U.K., and the Netherlands are just some of the nations who learned their tracking apps had security flaws only after they’d been put into use.