Some more perspective on the mind-boggling modeling from @BurnetInstitute.
*No country* which has achieved 64% vax of total pop. (equivalent to 80% of 16+) has seen 110 deaths/million population in one month (predicted for VIC in January.
Many countries with high vax, low infection-acquired immunity, and nearly zero restrictions have death rates more than 10X lower (Finland, Norway, Denmark).
Hard to understand why VIC covid deaths should exceed those in other low-covid countries by >10X.
2/
Burnet Institute predicts VIC will see 11,600 cases/M and 110 deaths/M (deaths 0.93% of cases!) in Jan 2022.
Last month (19 Aug-18 Sep):
UK started at 65% total pop vaxxed, had 14,851 *reported* cases/M and 55.5 deaths/M (deadliest mo. of delta; deaths 0.37% of cases).
3/
Israel had 61.9% vax, 28,418 *reported* cases/M, 86 deaths/M (0.30%).
Reported cases underestimate actual cases, so the death/case ratio is *overestimated* for UK and Israel, but the modeled cases are presumed to be the total.
4/
It is beyond belief to expect covid to be 2.5-3X deadlier (or more - as actual cases outnumber reported!) in VIC in Jan 2022 compared to UK and Israel last month, with few restrictions and lower vax.
Model is simply not credible.
5/5
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Today we’ll look around the world at countries which have had success at suppressing covid, the delta strain in particular, and see what lessons there might be for Australia.
The current debate centres on NSW's plan to ease restrictions at 70% double-dose vaccination of those aged 16+. That's equivalent to about 56% of the total population, though the added eligibility of 12-15s means more than 56% will have been double-vaccinated by the target.
2/🧵
Here's the plan. Briefly, fully vaccinated people will have access to:
- 5 visitors in a home, gatherings up to 20 outdoors,
- retail, hospitality,gyms, outdoor stadiums at 1 person per 4 m^2,
- weddings and funerals up to 50 guests,
- domestic travel
3/🧵
The UK is often held up as a cautionary tale regarding covid and re-opening.
Let's have a look at what happened in the UK and see if there are parallels to what is happening in Australia.
Thread.
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At the beginning of 2021 the UK was fighting a crushing wave of alpha with months of lockdown. As that wave receded, the UK began to release restrictions.
2/🧵
Restrictions were released at a very early stage of the vaccination program:
The UK "picnic day" and end of local-area restrictions to movement occurred on 29 March at 5.6% of total population vaxxed.
2)They don’t explain their assumptions about ongoing vaccination beyond 80%. This is key to understanding the model and it’s left unstated.
3)They say they adapt a peer-reviewed model, but that model was not used to model time-varying restrictions, and in fact did not include masks or lockdowns at all.
Here is a long/technical thread on my attempt to reverse-engineer the assumptions from the Doherty Institute report to the National Cabinet (linked) regarding delta severity, PHSM effectiveness, and vaccine effectiveness to match observations.
1/🧵 doherty.edu.au/uploads/conten…
Here are the figures from the Doherty Institute report. Note that there are a couple versions of these figures in the report; these assume the “all adults” strategy for vaccination.
2/🧵
The figures attempt to show graphically the effect of various interventions on the transmission potential (TP). TP is in essence R_eff, but calculated on the population level, as I understand it. When TP>1, cases grow, and TP<1, cases decline.
3/🧵