Alberta could see the same number of new COVID-19 cases by mid-April as there were at the height of the second wave in December.

~2000 by April 19,
~4000 by April 29

Thank you @laurby for interviewing me for this article.

1/
edmontonjournal.com/news/researche…
Projection from 2 days ago. Turns out conservative.

Today's actual total cases: 717 (projected: 563)
Most recent B117 doubling time: 7.3 days (faster then on this graph)

2/
W/ update: calculated today, the B117 doubling time is 7.3
R value: 1.46

3/
Those numbers will likely come sooner.

4/
With today's number of new VOC cases (325) the gov. of Alberta can start using their own model from Jan 25, that starts @ 250 VOC cases.
As @shandro said, it was "the worst case scenario".

Seems that gov. model had: R=1.42, dt=8 days

VOC reality is: R=1.46, dt=7.3 days
..

5/
...
dt = doubling time

@shandro @jkenney , our reality is worse than the "worst case scenario" predicted by your model on Jan 25.

cc: @CMOH_Alberta

6/
Dear Minister of Health @shandro , you are one of very few people in the province who has both means and power to prevent this disaster from happening.

Please act decisively to save lives, health, and prevent bankruptcies.

cc: @CMOH_Alberta

7/
.
@shandro @jkenney
Each week of waiting adds 2-8 weeks of lockdown.

We need financially supported lockdown ASAP. Otherwise we end up with a harsher and longer lockdown and more deaths already in April.

cc: @CMOH_Alberta
8/
The solution is as always: #COVIDzero #ZeroCovid #Go4Zero

Now, because we let the VOCs grow so much, it is 8-12 weeks to relative normalcy. We had a window of opportunity, when it would take *mere 6 weeks*. It's blown. But zero is still within reach.

9/
Vietnam, NZ, Australia, Atlantic Canada have recipes and know how on #ZeroCovid

Green Zones Strategy:

endcoronavirus.org/green-zones
Correction:
Gov. model seems to use for VOC: R=1.39, dt=8.4 days
(Not: R=1.42, dt=8 days, as I stated before)

VOC reality is: R=1.46, dt=7.3 days

So the difference is even bigger. Our reality is worse than the "worst case scenario" predicted by gov. model.

dt=doubling time

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Malgorzata (Gosia) Gasperowicz

Malgorzata (Gosia) Gasperowicz Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @GosiaGasperoPhD

19 Mar
B117 grows exponentially in AB *since 3 months*.
Doubling time as of Mar 14: 11 days, R=1.29

That’s fast. During AB fall surge cases were doubling every 18 days.

At this rate AB may have:

Apr 19, 1000 daily new cases,
May 03, 2000 daily new cases

1/
Future effects of reopenings and vaccinations are not included in this projection.
Reopenings will speed the growth up.

Vaccines…

2/
We don’t know exactly how effective the vaccines are against transmission.
Let’s assume 60% effectiveness:
Then, in order to break the exponential growth of B117, i.e. to reduce its R from current 1.29 to 1.00, 38% of people would need to be vaccinated.
We are not there yet.

3/
Read 8 tweets
13 Mar
Alberta:
Announced* new B117 cases seem to be doubling every 2 weeks.

At this rate AB could have:
1000+ daily cases around May 10,
2000+ daily cases in late May

*Please read footnotes under the graph.
1/
It is not doubling as fast as it could, e.g. not every 7 days.

But doubling every 2 weeks is still *very fast*.

It's *faster* than Alberta's November surge, when cases were doubling every 2.5 weeks.

2/
In theory vaccine could flatten such growth, if 40% of Albertans would get vaccinated and if the vaccine would be 60% effective against transmission.

As of today, 5.5% of ppl in AB received at least one dose.

Meanwhile, reopenings will likely increase the rate of spread.

3/
Read 4 tweets
13 Mar
A great simulation comparing the spread of variants over ~6 weeks, starting from 100 cases.
Wild Type R = 0.7
Assuming B117: 50% more transmissible, P1: 70% more transmissible than the Wild Type.
R=0.7 is what AB had at the end of the shut-down last spring. Wild Type daily case count was halving every 8 days.
Under that conditions P1 would still spread like a wildfire.
Please play/run the simulation few times.
Stochasticity (randomness): Each time the result is different, but Wild Type always goes down, while P1 in vast majority of runs shoots up super fast.

Read 9 tweets
12 Mar
“Public Health Director Horacio Arruda has said that vaccination will make COVID-19 less severe and that we could tolerate up to four to six times more cases if they were less severe. Yet if there is more community transmission, there will be more variants, more long-term COVID..
“...and the possibility of more long-term effects among the younger population.
...
Read 9 tweets
1 Mar
Scenarios for Alberta COVID spread.

Current policy seems to be producing a third "wave".

As always, #COVIDzero is the way out - the only rational and humane solution.
Had we adopted #COVIDzero strategy on Nov 11, we would have now *6.5 weeks of no community transmission*.
46 🍩days!
Which means businesses could be relatively safely reopened.
And we would have a perspective of a normal spring and summer.
...
Maybe we would need to stamp out small flare ups, but the vast majority of people who got sick or died from COVID between Jan 15 and today, would be healthy and alive.
And people who need to live in isolation since 1 year, could now have normal life. Since couple of weeks.
...
Read 4 tweets
15 Feb
With B117 here we must aim for COVID zero or we will have a third wave and the worst lockdown yet 👇

My recent article in The Progress Report @ProgressAlberta edited by @duncankinney 🙏
theprogressreport.ca/_now_that_b117…
Image
But this bleak scenario is not inevitable. We have a window of opportunity now, when the new variant is not yet well established and doesn’t have a strong foothold, to avoid that terrible future. Image
Read 6 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!

Follow Us on Twitter!