5 votes You don't need invasive tech for successful contact tracing Posted May 21, 2020 by spit-evil-olive-tips Tags: contact tracing, surveillance, coronaviruses.covid19, health.public, technology, author.caroline chen, source.propublica https://www.propublica.org/article/you-dont-need-invasive-tech-for-successful-contact-tracing-heres-how-it-works