Misar the first article is really a discussion of the theory of contact tracing, which is sound, and a discussion of why it failed in different countries. I can't see anywhere where it says its ever been wildly successful, with the exception maybe of Vietnam.
I think the fact is that governments around the world have taken differing approaches yet still nearly every country has a worsening problem, so either each country has some good and some bad points, or this is bordering on the edge of uncontrollable, which I'm tending to think is not so far away in the UK without improved "buy-in" from the general public - and to me that feels like it's heading in the opposite direction.
I hope the vaccines are not impaired by the mutations.
I also hope the governments look harder at therapeutic drugs than they have been, so that the effect and duration of infection is reduced. Look at, for instance, www.synairgen.com/covid-19/ (which I think is about to enter an abbreviated Phase 3 test in the US) and www.tizianalifesciences.com/our-focus/covid-19
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