Tara Moriarty Profile picture
Jan 22 80 tweets 16 min read
The Jan 22-28 Canadian COVID Forecast and associated data are now live.

SEVERE: CAN, BC, MB, NL, NS, ON
VERY HIGH: AB, NB, North, PEI
HIGH: MB, QC, SK

All but PEI stable or decreasing

About 1 in 32 people in Canada are CURRENTLY infected.

Link: covid19resources.ca/covid-hazard-i This image shows a series of gauges with the January 22-28,
We're seeing a decline in severe outcomes in multiple provinces, with decline in waste water and estimated total infections in many.

It looks like we're coming out of the holiday wave/surge--the duration looks fairly similar to the surge we saw around Thanksgiving.
But....as you can see from this image here, estimated actual infections are continuing to increase for multiple provinces (CAN, BC, NL, NS, ON, North)--not fast (except for North), but steadily.

If/when we see hospitalizations pick up we'll likely be in the XBB.1.5 surge/wave.
With Ontario XBB.1.5 currently (actually last week) at ~30% of sequenced samples, I'd guess we'll see Ontario severe outcomes start to take off in the coming week.
We also only have waste water data for many regions up to about Jan 14 (older than that for quite a few). We'll be watching the next week or two of data closely.
Something I think it's really important for people to consider wrt the XBB.1.5 in eastern U.S. states is that surges in hospitalizations are likely not just due to surges in infections, but also the low uptake of boosters even among those at higher risk of severe outcomes.
Protection against severe outcomes does slowly decline over time. If you haven't had a new shot in the last 6 months, you really, really, really need to update your vaccines. This is STRONGLY recommended in the most recent NACI guidance.

Get your next shot, PLEASE.
On to the individual provincial forecasts.

Here's the link where you can download png and jpeg files for these graphics if you want: drive.google.com/drive/u/1/fold…

No, they're not up on our website yet. We're slow.
FYI--there are a few provinces where we'd be dropping recommendations down a notch so that people who are not higher risk are no longer advised to avoid non-essential indoor settings.
But, given that we're likely transitioning into an XBB.1.5 wave, and that most Canadian data is at least 1 week behind, we're keeping recommendations at the level specific to VERY HIGH and SEVERE index levels.
Canadian COVID Forecast Jan 22-28, 2023

CANADA

SEVERE

About 1 in every 32 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast, which is p
Canadian COVID Forecast Jan 22-28, 2023

CANADA

SEVERE

About 1 in every 32 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~11X higher
🟡Hospitalizations ~7X higher
🟡Deaths ~7X higher This image describes the Canadian COVID Forecast for January
About 1 in 32 people in Canada this week are infected/infectious.

If you're higher risk, this is a good week to use curbside or home delivery, or ask others to help.

If you are NOT higher risk, this is a good week to ask neighbours, family, friends if you can help out. A blue-bordered image by Covid-19 Resources Canada has 3 sma
Canadian COVID Forecast Jan 22-28, 2023

NEWFOUNDLAND AND LABRADOR

SEVERE

About 1 in every 35 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Newfoun
Canadian COVID Forecast Jan 22-28, 2023

NEWFOUNDLAND AND LABRADOR

SEVERE

About 1 in every 35 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~12X higher
🟡Hospitalizations ~12X higher
🟡Deaths ~5X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

PRINCE EDWARD ISLAND

VERY HIGH

About 1 in every 57 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Prince
Canadian COVID Forecast Jan 22-28, 2023

PRINCE EDWARD ISLAND

VERY HIGH

About 1 in every 57 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~12X higher
🟡Hospitalizations ~6X higher
🟡Deaths ~6X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

NOVA SCOTIA

SEVERE

About 1 in every 35 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Nova Sc
Canadian COVID Forecast Jan 22-28, 2023

NOVA SCOTIA

SEVERE

About 1 in every 35 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~14X higher
🟡Hospitalizations ~9X higher
🟡Deaths ~14X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

NEW BRUNSWICK

VERY HIGH

About 1 in every 53 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for New Bru
Canadian COVID Forecast Jan 22-28, 2023

NEW BRUNSWICK

VERY HIGH

About 1 in every 53 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~11X higher
🟡Hospitalizations ~4X higher
🟡Deaths ~5X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

QUEBEC

HIGH

About 1 in every 36 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Quebec,
Canadian COVID Forecast Jan 22-28, 2023

QUEBEC

HIGH

About 1 in every 36 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~8X higher
🟡Hospitalizations ~5X higher
🟡Deaths ~3X higher This image describes the Canadian COVID Forecast for January
FYI--for those wondering why QC hasn't hit same maxima as rest of country since start of fall...

Two possible explanations:

1) QC has significantly higher fresh dose uptake among people 40+ than most provinces (except BC)

2) QC had a large summer wave w/ substantial mortality.
Higher fresh vax dose uptake among those at risk of severe outcomes plus lots of infections in last 6 months may be blunting/shortening waves in QC--at least for now.
Canadian COVID Forecast Jan 22-28, 2023

ONTARIO

SEVERE

About 1 in every 31 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Ontario
Canadian COVID Forecast Jan 22-28, 2023

ONTARIO

SEVERE

About 1 in every 31 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~14X higher
🟡Hospitalizations ~9X higher
🟡Deaths ~9X higher This image describes the Canadian COVID Forecast for January
One persistent trend we've noticed since the summer is that provinces that had lower seroprevalence by end of summer are experiencing bigger/longer surges than provinces where more the population has been infected at least once.
It's not a huge difference, and by now almost all provinces have/are close to having about the same % of population infected at least once. But for those that are slightly lower, surges seem to be more intense and longer.

This makes sense--there's less tinder to light the fire.
What is not clear is how long that blunting effect will last. It's always good to follow QC data, since it's generally reported fast and accurately (although even QC has started modifying reporting of hospitalizations).
And it's always possible the apparent blunting effect reflects changes in reporting, although I'm more inclined to think this is blunting.
Certainly it's no surprise that Atlantic provinces, ON and BC have been having the worst time through the fall until now, since seroprevalence in these provinces is lower than QC AND they have lower rates of booster uptake than QC (except BC).
Anyway....back to the thread :)
Canadian COVID Forecast Jan 22-28, 2023

MANITOBA

HIGH

About 1 in every 77 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Manitob
Canadian COVID Forecast Jan 22-28, 2023

MANITOBA

HIGH

About 1 in every 77 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~8X higher
🟡Hospitalizations ~3X higher
🟡Deaths ~4X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

SASKATCHEWAN

HIGH

About 1 in every 65 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Saskatc
Canadian COVID Forecast Jan 22-28, 2023

SASKATCHEWAN

HIGH

About 1 in every 65 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~7X higher
🟡Hospitalizations ~7X higher
🟡Deaths ~2X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

ALBERTA

VERY HIGH

About 1 in every 48 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for Alberta
Canadian COVID Forecast Jan 22-28, 2023

ALBERTA

VERY HIGH

About 1 in every 48 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~11X higher
🟡Hospitalizations ~6X higher
🟡Deaths ~2X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

BRITISH COLUMBIA

SEVERE

About 1 in every 31 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings. This image describes the Canadian COVID Forecast for British
Canadian COVID Forecast Jan 22-28, 2023

BRITISH COLUMBIA

VERY HIGH

About 1 in every 31 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~8X higher
🟡Hospitalizations ~8X higher
🟡Deaths ~15X higher This image describes the Canadian COVID Forecast for January
Canadian COVID Forecast Jan 22-28, 2023

NUNAVUT, NORTHWEST TERRITORIES, YUKON

VERY HIGH

About 1 in every 38 people is infected.

HOW TO HELP:
Mask, get your booster, avoid non-essential indoor public places, social gatherings.

Higher risk: also avoid outdoor social gatherings This image describes the Canadian COVID Forecast for the Nor
Canadian COVID Forecast Jan 22-28, 2023

NUNAVUT, NWT, YUKON

VERY HIGH

About 1 in every 38 people infected

Compared to lowest point of pandemic in Canada:

🟡Waste water, infections, long COVID cases ~11X higher
🟡Hospitalizations ~5X higher
🟡Deaths ~6X higher This image describes the Canadian COVID Forecast for January
I'm going to take a break, but will be back soon to do a series of polls to find out how well people following this thread understand who is at higher risk of severe outcomes from COVID, according to information posted on the official pages of PHAC and provinces.
Feel free to start listing the categories you know are associated with higher risk in the replies until I get back.

And yes, you can cheat by going to PHAC and provincial public health pages to look this up.

Ready, set, GO!
Let the polling begin!

Test your knowledge of who is at higher risk of severe COVID outcomes and should take extra precautions to avoid infection, according to @GovCanHealth.
Are you at higher risk of more severe COVID outcomes

IF YOU ARE OLDER THAN 60?
Answers will be posted in 7 days.

Or you can look them up at the link here: canada.ca/en/public-heal…
Are you at higher risk of more severe COVID outcomes

IF YOU ARE PREGNANT?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE DOWN SYNDROME?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE not RECEIVED A COVID VACCINE DOSE or BEEN INFECTED IN THE LAST 6 MONTHS?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE MODERATE TO SEVERE ASTHMA?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE DEMENTIA?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE DIABETES?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE HEART DISEASE?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE HIGH BLOOD PRESSURE?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE KIDNEY DISEASE?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE LIVER DISEASE?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE LUNG DISEASE?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE/HAVE HAD STROKE?
Are you at higher risk of more severe COVID outcomes

IF YOU ARE IMMUNOCOMPROMISED FROM AN UNDERLYING MEDICAL CONDITION SUCH AS CANCER?
Are you at higher risk of more severe COVID outcomes

IF YOU TAKE MEDICATIONS THAT REDUCE THE IMMUNE RESPONSE, SUCH AS CHEMOTHERAPY
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE HAD A SOLID ORGAN OR BLOOD STEM CELL TRANSPLANT?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE HAD A SOLID ORGAN OR BLOOD STEM CELL TRANSPLANT?
Are you at higher risk of more severe COVID outcomes

IF YOU LIVE WITH OBESITY (BMI>40)?
Moving on to other risk categories described on provincial websites. Why? Because the PHAC list is not exhaustive, and doesn't include all examples.

Data from provincial websites was compiled by the wonderful @emeraldclover5
Are you at higher risk of more severe COVID outcomes

IF YOU ARE AN INFANT UNDER 1 YEAR OF AGE?
Are you at higher risk of more severe COVID outcomes

IF YOU ARE AN INFANT UNDER 1 YEAR OF AGE?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE AN INTELLECTUAL OR DEVELOPMENTAL DISABILITY?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE A NEUROLOGICAL DISORDER?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE SICKLE CELL DISEASE?
Are you at higher risk of more severe COVID outcomes

IF YOU SMOKE?
Are you at higher risk of more severe COVID outcomes

IF YOU USE INJECTION DRUGS?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE PROBLEMATIC ALCOHOL USE?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE SCHIZOPHRENIA OR A PSYCHOTIC DISORDER?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE UNTREATED HIV/AIDS?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE A BLOOD DISEASE SUCH AS ANEMIA OR A CLOTTING DISORDER?
Are you at higher risk of more severe COVID outcomes

IF YOU HAVE CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD)?
Are you at higher risk of more severe COVID outcomes

IF YOU LIVE IN AN ISOLATED OR REMOTE COMMUNITY?
The answers to all of the above poll questions are YES.

What percentage of the Canadian population do you think falls into ONE OR MORE of these higher risk categories?

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More from @MoriartyLab

Jan 15
The Jan 15-21 Canadian COVID Forecast and associated data are now live.

SEVERE: CAN, BC, MB, NL, NS, ON, QC
VERY HIGH: AB, NB, North, SK
HIGH: PEI

All except PEI, NB, SK stable or increasing

About 1 in 24 people in Canada are CURRENTLY infected.

Link: covid19resources.ca/covid-hazard-i… This image shows a series of gauges with the January 15-21,
Before I share province info, it's important to know that estimated infection numbers are similar to recent numbers for the UK, even without much XBB.1.5.

Here's a screenshot from @ONS showing infection numbers from randomly sampled testing.

About 1 in 20 people infected. This is a screenshot from the UK Office of National Statisti
@ONS There have been big changes in the most recent week, partly because December holiday data finally came in and we started getting waste water data for the end of December/early January.
Read 72 tweets
Jan 13
Canadian COVID Forecast and excess mortality threads for January 2023

To make it easier to find them quickly :)

All data/forecasts are available on the @COVID_19_Canada website here:

covid19resources.ca
@COVID_19_Canada If you have questions about the data and/or about COVID in Canada, we have several free, bilingual evening Zoom sessions every week where people can join to talk with me, other researchers and people across the country.

Here's where to sign up to join:

covid19resources.ca/discussions/
@COVID_19_Canada Here's the link to our weekly Canadian COVID Forecast and associated modelling/tracking data:

covid19resources.ca/covid-hazard-i…
Read 7 tweets
Jan 13
The @COVID_19_Canada Excess Mortality Tracker update to Nov 5/22 is now live.

Total drug-/heat wave-adjusted excess mortality for Canada from Jan 25/20 to Nov 5/22: 68,000 deaths

Link: covid19resources.ca/public/excess-…
@COVID_19_Canada Excess mortality totals:

CAN 68,263
NL 1,833
PEI 294
NS 1,790
NB 1,621
QC 13,333
ON 18,907
MB 1,813
SK 3,569
AB 10,299
BC 14,803

Mortality reporting is still VERY incomplete for most provinces, with an estimated 72,000 all-cause deaths not yet reported for this period. Image
@COVID_19_Canada In Quebec, all excess mortality for this period is accounted for by reported COVID deaths (see row 3 in table at bottom).

This also appears to be true for Manitoba, although all-cause mortality reporting in MB is so far behind that it's harder to be certain. Image
Read 43 tweets
Jan 6
The Jan 4-10 Canadian COVID Forecast and associated data are now live.

SEVERE: CAN, BC, MB, NB, NL, ON
VERY HIGH: North, PEI, SK
HIGH: AB, NS, QC

About 1 in every 38 people in Canada are currently infected.

PLEASE TAKE PRECAUTIONS

Link: covid19resources.ca/covid-hazard-i…
It is now clear that we're seeing the beginning of a new wave.

BUT...the data we have from last week to do this forecast is still quite incomplete due to delayed reporting.
We're releasing this now instead of waiting until next week when data are more complete so people know a new wave has started and that they need to start/resume/continue taking precautions.
Read 93 tweets
Dec 22, 2022
The Dec 21-Dec 27 Canadian COVID Forecast and associated data are now live.

SEVERE: BC, NB, NL, PEI
VERY HIGH: CAN, ON, QC, SK
HIGH: AB, NS
ELEVATED: MB
MODERATE: North

Link: covid19resources.ca/datadiscussion…
The scores have become more volatile in the last week. We usually see this at start of new waves, when some provinces are still seeing some numbers coming down quite low compared to earlier periods, but there are starting to be spikes in other variables, especially waste water.
We're not sure if there will be a new wave, or if it will happen in all provinces. Some, like PEI and NS, were in a very prolonged very high period recently, so numerous reinfections may be less likely there. Maybe.
Read 53 tweets
Dec 22, 2022
Hi folks,

The Dec 21 Canadian COVID forecast and data are now live.

I'll do a full thread tomorrow when the team has our graphics ready to go.

But I wanted to get the overview out because some provinces are increasing, including QC, which usually warns rest of country.
I've had time to update more of the model and input data, so it might be worth checking out for the data folk.

We've also started hand-tallying the severe outcomes by age and date in the PHAC weekly epi report. It's not downloadable, so it's a lot of work.
When we're done, we'll post the numbers on a publicly accessible page so no one else has to do the hand tallying to use the data in their analyses. We'll try to update weekly or biweekly--it's REALLY time consuming to do. I'm not great at scraping data from web pages. Sigh.
Read 6 tweets

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