As part of @oz_f comprehensive piece on contact tracing, I did some data analysis on 🔵VIC and ⚫️NSW case at the beginning of their respective '2nd waves'

To measure exactly when contact tracing broke down, we must monitor the "under investigation" source of infection number
/1
June 9th 🔵Victoria records 0 new cases.

June 17th : Victoria records their first day of 10+ local cases. The 3-day testing avg is 5,991.

June 25 : After the *third* consecutive day of 10+ local cases, the under investigation count is 26 and continues to rise.

/2
It's from this point the 'under investigation' count never recovers, peaking at 3,969 on Aug 5.

While there was a massive upscale in testing at the time, it might of been too late. It wasn't until July 7 (Day 21) to average 26k tests a day.

Reclassifications also appear.

/3
July 13 ⚫️NSW records 10 local cases. The 3-day testing avg is 14,170

Jul 23 : NSW manages *6* days in a row of 10+ cases. The 'under investigation' remains at 0 and the test avg close to 20k

Aug 7 : NSW manages *11* consecutive days of 10+ cases with a 25k test average

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@oz_f piece on contact tracing in Victoria https://twitter.com/oz_f/status/1304537611621609472
I forgot to mention, it was also during this "upscale" testing that reclassifications started to appear in 🔵 Victoria

28 June : 8 reclassifications

~1368 reclassifications since 28 June (largely due to duplication)

almost the infamous *routine testing* classification
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