Even if they do that, they can only track the people who self report as contaminated for the period during which the self reporting applies (i.e. n days before testing positive). Not before, not after.
But I just can't think of a system that achieves contact tracing while no one having any idea of the whereabouts of a person who self declares as contaminated. At one point the person who self declares has to volunteer to disclose some information.
But I just can't think of a system that achieves contact tracing while no one having any idea of the whereabouts of a person who self declares as contaminated. At one point the person who self declares has to volunteer to disclose some information.