https://apple.news/AEeGWztiwSqiwClYBfEv1ew
This was an interesting article I read. Basically the gist is that we should be looking at a K variable not an R variable. Majority of spread is not between large numbers of infected individuals but 1 or 2 super-spreaders who infect the majority of new cases.
If that is correct then contact tracing should not be directed in a forward or parallel fashion (which aims to identify whom among your contacts might be infected or get infection) but in a retrospective direction (looking backwards through contacts to identify the super-spreader) which might be a few generations of contacts in the past.
