Public health authorities interviewed everyone had tested positive for Covid, and their contacts, and then alerted who they thought should isolate – to stop the spread of Covid. Similarly, “digital” contact tracing using phones did not work either (for a ton of reasons it never could work).
Like everything public health did for Covid, it did not work: The epidemiological impact of digital and manual contact tracing on the SARS-CoV-2 epidemic in the Netherlands: empirical evidence. (preprint) | medrxiv; 2023. | PREPRINT-MEDRXIV (bvsalud.org)
