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Tara Moriarty

Tara Moriarty
@MoriartyLab

Jul 4, 2025
29 tweets
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Canadian COVID Forecast: Jun 28-Jul 11, 2025 SEVERE: none VERY HIGH: none HIGH: ON MODERATE: CAN, AB, BC, MB, NB, NL, North, NS, PEI, QC, SK About 1 in 120 people in Canada are CURRENTLY infected.

This image shows a series of gauges with the Jun 28-Jul, 2025 COVID Forecast scores for Canada, the provinces, and territories. Read from left to right:

Canada: 4.8 - MODERATE
Alberta: 5.0 - MODERATE
British Columbia: 4.4 - MODERATE
Manitoba: 4.2 - MODERATE
New Brunswick: 4.2 - Bloody Hell
Newfoundland and Labrador: 4.3 - MODERATE
North: 4.5 - MODERATE
Nova Scotia: 4.5 - MODERATE
Ontario: 5.2 - HIGH
Prince Edward Island: 4.4 - MODERATE
Quebec: 4.8 - MODERATE
Saskatchewan: 4.3 -  MODERATE

All COVID Forecast input data and sources are available here:
(https://covid19resources.ca/covid-hazard-index/)

Forecast scores are grouped into 4 ranges: MODERATE (1 to <5, white), HIGH (6 to <10, yellow), VERY HIGH (10 to <15, orange), SEVERE (>15 red)."

To access the past scores table, please visit https://covid19resources.ca/covid-hazard-index
Notre aperçu national en français : x.com/MoriartyLab/st
Tara Moriarty

Tara Moriarty
@MoriartyLab

Prévisions de COVID pour le Canada : JUN 28-JUL 11, 2025 GRAVE : aucun TRÈS ÉLEVÉ : aucun ÉLEVÉ : ON MODÉRÉ : CAN, AB, CB, MB, NB, TNL, Nord, NÉ, ÎPÉ, QC, SK Environ 1 personne sur 120 est actuellement infectée au Canada.
WHAT'S NEW THIS WEEK? Forecast scores are stable and moderate in most provinces. About 1 in 120 people in Canada is currently infected (33,000-43,000 infections/day).
Graph showing the reported % excess mortality compared to excess mortality predicted from waste water, our model, and the Canadian COVID Forecast score

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 10 (Actual and model-predicted excess mortality)
Graph showing estimated new daily infections for Canada, the provinces, and territories (5 week rolling averages)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 11 (Infections)
Hospitalizations and deaths are stable (-2 to 0% per week across Canada). Expected excess mortality due to COVID-19 in Canada is MODERATE (5%, Forecast score 5).
Graph showing Canada's estimated (predicted) new daily COVID hospitalizations, by province, since Dec 2021. (5 week rolling averages)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 16 (Hospitalizations, ICU)
Graph showing expected deaths resulting from estimated new daily infections, by province, since Dec 2021. (5 week rolling averages)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 18 (Deaths)
Infections in Canada this week are expected to result in 1,100 hospitalizations, 230 deaths (people who die at least 1 year earlier than they would without COVID) and 8,400 new long COVID cases serious enough to limit daily life activities.
3 tables showing total expected hospitalizations since Dec 2/21 by province (error range -/+ 10%), total expected ICU admissions since Dec 2/21 by province (error range -/+ 10%), and total expected deaths since Dec 2/21 by province (error range -/+ 10%)

Tables available at: https://covid19resources.ca/covid-hazard-index
Page 19 (Reported deaths, ICU, hospitalizations by age)
Graph showing Estimated new daily infections resulting in daily life activity-limiting symptoms lasting >3 months, by province, since Dec 2021. (5 week rolling averages)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 13 (Long COVID)
About 2.6% of people in Canada are infected and/or experiencing life activity-limiting long COVID this week. The estimated cost of hospitalizations from this week's infections in Canada is $24.1M.
Graph showing Canada's estimated daily % of population infected or experiencing long COVID, by province (average error -/+ 10% overall; 7% last 2 weeks)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 15 (Combined prevalence: Infections, LongCOVID)
Table showing estimated new daily and cumulative Omicron hospitalization costs by province - 5 week rolling averages (average error -/+ 10% overall; 7% most recent 2 weeks)

Table available at: https://covid19resources.ca/covid-hazard-index
Page 17 (Hospitalization costs, burden)
Hospitalizations are expected to require 1.7% of Canada's staffed hospital beds for three weeks (CIHI: average duration of COVID hospitalizations: cihi.ca/en/covid-19-ho ).
Table showing estimated % over pre-pandemic hospital capacity (new daily and average Omicron to date) by province - 5 week rolling averages (average error -/+ 10% overall; 7% most recent 2 weeks)

Table available at: https://covid19resources.ca/covid-hazard-index
Page 17 (Hospitalization costs, burden)
CONFIDENCE OF ESTIMATES The confidence interval for infection estimates this week is -/+ 13%. The last date when comparison data for the UK are available from ONS and Ward et al 2024 is Feb 26/23: nature.com/articles/s4146
From Dec 5/21 to Feb 26/23, median weekly infection prevalence, infection fatality and hospitalization rates for Canada are similar to median weekly UK values (prevalence 1.00X UK, IFR 1.03X UK, IHR 0.99X UK; p>0.05).
FOCUS ON PROVINCES: NEWFOUNDLAND AND LABRADOR The Forecast score this week is 4.3 (MODERATE). Infections in the province this week are expected to result in 3 deaths, 16 hospital admissions and 110 new daily life activity-limiting long COVID cases.
Graph showing estimated new daily infections for Newfoundland and Labrador (5 week rolling averages)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 11 (Infections)
Graph showing expected deaths resulting from estimated new daily infections for Newfoundland and Labrador, since Dec 2021. (5 week rolling averages)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 18 (Deaths)
About 2.5% of people are infected and/or experiencing daily life activity-limiting long COVID this week. The estimated cost of hospitalizations from this week's infections in the province is $356K.
Graph showing Canada and Newfoundland and Labrador’s estimated daily % of population infected or experiencing long COVID (average error -/+ 10% overall; 7% last 2 weeks)

Graph available at: https://covid19resources.ca/covid-hazard-index
Page 15 (Combined prevalence: Infections, LongCOVID)
Hospitalizations are expected to require 1.2% of staffed hospital beds for three weeks (CIHI: average duration of COVID hospitalizations).
According to the most recent COVID-19 vaccination coverage data from PHAC, 3.0% of people in the province are vaccinated against COVID-19 according to recommendations: health-infobase.canada.ca/covid-19/vacci The Canadian average is 3.9%.
Since Dec 5, 2021, Newfoundland and Labrador has publicly reported 23% of 7,900 expected COVID-19 hospitalizations and 28% of 1,651 expected deaths (people who die from COVID-19 at least 1 year prematurely).
Quebec is Canada's best-reporting province. Since Dec 5, 2021, Quebec has reported 100% of expected hospitalizations and 46% of expected deaths. Newfoundland and Labrador has reported <23% of hospitalizations reported by Quebec, and 50% of deaths reported by Quebec.
NEXT FORECAST DATE: August 9, 2025. Please join us virtually on August 12 at 8 p.m. ET for a Data Discussion of the latest changes to the Forecast model as the sources of data available to us continue to dwindle.
Register in advance for this meeting: (Select Aug 12, 2025 in dropdown box) us06web.zoom.us/meeting/regist
The CSA Z94.4:2024 Selection, use and care of respirators draft standard has been posted for a 60-day public review period. If this standard is adopted, respirators will be required in health care settings by default. Your feedback can help.
Here are some of the proposed changes to improve workplace safety in healthcare settings: 😷 surgical masks should not be used for respiratory protections 😷 elastomeric respirators are to be put into widespread use & there are several situations where they are the preferred option vs N95
😷 every worker in healthcare settings is to use a respirator, no longer just HCWs 😷 patients are to be given respirators and only given surgical masks if unable to wear a respirator 😷 respirators are to be worn in all areas and at all times unless it’s an area with high air exchange rates
CSA Group is a Standards Development Organization that develops standards and testing protocols for industrial products and workplaces. Their standards are often, but not always, adopted by the Standards Council of Canada.
Each standard is reviewed at least every five years, and before any standard is finalized, it is offered up for public review. The closing period for public review is August 19th, 2025. publicreview.csa.ca/Home/Details/5
@ᒪᐢᑭᑭᓂᑲᒧᐣ ᐃᐢᑫᐧᐤ 😷 is having a virtual Full Moon circle for COVID-conscious women on Wednesday, July 9th. Join here, it’s PWYC: eventbrite.ca/e/full-moon-he
COVID outbreak risk remains in #ONhealth hospitals without layers of protection. Universal masking in ALL areas of #Ontario hospitals is essential for safe healthcare access. Let regional decision-makers know this is a priority. @Safe Care Ontario Take action: safecare.initiative.works
The regional Canadian COVID forecast can be found here: x.com/MoriartyLab/st
Tara Moriarty

Tara Moriarty
@MoriartyLab

Canadian COVID Forecast Jun 28-Jul 11, 2025 CANADA MODERATE (no change) About 1 in every 120 people infected Compared to lowest point of pandemic in Canada: -Infections ~5X higher -Long COVID ~7X higher -Hospitalizations ~5X higher -Deaths ~4X higher
This image describes the Canadian COVID Forecast for Jun 28-Jul 11, 2025 by COVID-19 Resources Canada. Canada’s COVID Forecast outlook is MODERATE (no change) with a COVID INDEX SCORE of 4.8
About 1 of every 120 people is infected.
Estimated infections this week: 230,675-301,825
How much higher are key indicators compared to the lowest point in the COVID pandemic in Canada?
Waste water, infections: HIGH; 5.1X higher
Long COVID estimate: HIGH; 6.5X higher
Hospitalizations, ICU: HIGH; 5.1X higher
Deaths: MODERATE; 4.4X higher
HOW TO HELP:
EVERYONE:
UPDATE vaccines every 6 months
WEAR N95-type masks

Who is HIGH RISK?
People 60 and older, babies < 1 year, pregnant
ALL AGES: immunocompromised OR medically at-risk OR no vaccine or infection in the last 6 months
Sources, data and methods for the COVID Index are available at www.Covid19Resources.ca
For links to resources, explanations of the forecast methods, and past forecasts, please see our pinned 🧵 here: x.com/MoriartyLab/st
Remember, the forecast reflects not only recent input data, but also numbers expected for the next 2 weeks, based on 5-week average trends. The next forecast will be August 11th, 2025.
Thanks to @Pam Gaines #nosuchthingasmildcovid @CircaLiz @Brittany @Jeweljam_ILF @Ryan and @allenescott for data input, graphics, and translation.
Thanks to the whole COVID-19 Resources Canada team for weekly feedback and for keeping all our work going. #TogetherWeCan
Tara Moriarty

Tara Moriarty

@MoriartyLab
🏳️‍🌈🇨🇦Assoc Prof @UofT. Bloodborne infections, Lyme disease, misinfo. @COVID_19_Canada. Defend journalism. Opinions mine. @MoriartyLab.bsky.social
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