SunStar + January 12, 2021 IN THE name of contact tracing and of containing Covid-19, more and more business establishments and local government units are rolling out contact tracing apps. Since Covid-19 is a notifiable disease, people are obliged to register and share their personal data. But do these apps protect your personal data? How? In November last year, the National Privacy Commission (NPC) called on the software developers of contact tracing apps to be "privacy advocates" and to implement "privacy by design"as more and more LGUs use technology to track down their constituents in the name of public health and safety (https://www.privacy.gov.ph/2020/11/developers-of-lgus-contact-tracing-apps-enjoined-to-act-as-privacy-watchers/).