I suspect that with vaccination levels over 90% contact tracing becomes a bit of a pointless exercise. The risk equation has altered significantly. When we had our lockdowns in winter, Australia was in a very different situation - low vaccination levels, little circulating virus and large consequences of catching it.
Today looking at NSW or the ACT as an example:
Very high vaccination rates - means he consequences of catching it for most people is a dose of the flu for a week or so - not pleasant but better than a significant chance of a hospital stay.
A greater level of virus circulation - the chances of catching it are comparatively higher
It probably is time to accept that those who are not vaccinated by choice cannot be protected by the greater population any more. My sympathies go out to those who cannot be vaccinated.
Go home, your igloo is on fire....
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