Contact tracing has been an indispensable tool for controlling infectious disease since the late 1800s. It was central to the control of typhoid, TB, STDs, HIV, smallpox, measles, and you-name-it. Conducted properly, it is not invasive. Please do not suggest throwing the baby out with the bath water just because it can be used as an excuse for privacy violations. People can enjoy neither freedom nor security if they are dead.
