Provincial COVID-19 Surveillance


To guide the Public Health response to COVID-19, Epidemiology and Surveillance has been monitoring the intensity and geographic spread, characteristics of both cases and contacts, and transmission in various populations. Surveillance data collected includes syndromic, laboratory and public health investigation data about cases and contacts to detect activity in both community and in health care settings.

In this weekly COVID-19 surveillance report, we provide regular updates about the current activity of COVID-19 in Manitoba with two overall objectives:

Data are reported with a one-week delay for increased data accuracy, completeness and reliability. More analyses continue to be conducted and will be added to this report as available. It is published online at approximately 10:00am every Monday.

Week 35 (August 23 – August 29)

About epidemiological week

Data extracted up to 4:00am on September 4, 2020
Next reporting date: September 14, 2020

Provincial Summary: Decreased Activity

In Week 35, there were 224 laboratory-confirmed COVID-19 cases reported in Manitoba, a decrease from 272 in the previous week. The volume of lab tests dropped to an average of over 1,400 people tested for COVID-19. The positivity rate of lab tests was 2%, a decrease from 2.5% in the previous week. The respiratory activity levels in the community, primary care and emergency rooms continued to be low.

In an examination of the 224 cases reported this week, approximately half were reported from Prairie Mountain Health and 30% were reported from the Winnipeg Regional Health Authority. Southern Health - Santé Sud Regional Health Authority accounted for 18%, and Interlake Eastern had 7 new cases. Note that approximately 70% of the cases this week were close contacts to known cases and under 5% were considered travel related.

Overall, older adults and those with underlying illnesses are at higher risk for severe outcomes as a result of COVID-19 infection. Though the total number of cases this week decreased, there were slightly more cases related to long-term care facilities. Note that in the long-term care facility setting, an outbreak will be declared even only one case is reported.

The number of reported respiratory outbreaks remains low for this time of year.

Cases

About cases

  • New cases: 224
  • Total cases: 1,195
  • Recovered cases: 783
More Analyses

Testing

About testing

This week

  • Average daily specimens: 1,438
  • Weekly positivity rate: 2%

Total

  • Tested people: 121,990
  • Population tested: 8.9%
  • Positivity rate: 0.9%
More Analyses

Severity

About severity

Severe outcomes associated with COVID-19:

  • Hospitalizations: 52
    • ICU admissions: 20
  • Deaths: 15
More Analyses

Outbreaks

About outbreaks

  • COVID-19 outbreaks: 14
    • COVID-19 outbreaks in long-term care facilities: 7
More Analyses

FluWatchers

About FluWatchers

Participants reporting: 415

Reporting fever and cough: 0.2%

Check Trend

Physician Visits

About sentinal physicians

Influenza Like Illness (ILI) Visits to sentinel physicians: 0.3%

Check Trend

ED Visits

About emergency room visits

Average daily respiratory visits to emergency department (ED): 96

Check Trend

Exposure

About exposure

Source of infection in cases (% of total)

  • Travel: 17.9%
  • Close contact to cases: 59.7%
  • Unknown: 14.9%
  • Pending: 7.4%

Close contacts to cases

  • Top contact type: Household exposure
  • Household contacts converting to cases: 11.2%
More Analyses

Risk Factors

About risk factors

  • Pregnant cases: 16
  • Health care workers**: 69
  • Recovered health care workers: 61
More Analyses

Symptoms

About symptoms

Symptomatic cases: 86.9%

Top symptoms (% of reports)

  • Cough: 55.1%
  • Headache: 45.8%
  • Fever: 37.9%
  • Muscle pain (myalgia): 36.4%
  • Sore Throat: 33.5%
More Analyses

Important Notes

  1. Data about COVID-19 cases and contacts are extracted from PHIMS.
  2. Numbers are subject to change. Missed events in the current report due to reporting delays will be included in later reports when data become available.
  3. *ICU admissions were also included in hospitalizations.
  4. **Health care workers include personnels in hospitals, long-term care settings, community health clinics and services (including agency staff), and diagnostic/laboratory services.

Cases

Figure 1. Cases of COVID-19 by Week of Public Health Report Date, Manitoba, 2020

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Figure 2. Cases of COVID-19 by Sex and Age Group, Manitoba, 2020

Figure 3. Cases of COVID-19 by Health Region and Week of Public Health Report Date, Manitoba, 2020

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Table 1. Cases of COVID-19 by Health Region, Manitoba, 2020

Health Region Cases Percentage
Winnipeg RHA 416 34.8%
Southern Health-Santé Sud 259 21.7%
Interlake-Eastern RHA 75 6.3%
Prairie Mountain Health 440 36.8%
Northern Health Region 5 0.4%

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Testing

Figure 4. Average Daily Testing Volume and Positivity (%) for COVID-19 by Week of Specimen Receiving Date, Manitoba, 2020

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Table 2. Cumulative National Testing Volume and Positivity (%) for COVID-19 by Province/Territory, Canada, 2020

Province Confirmed Cases Tests Completed Tested Population (Estimated %) Positivity Rate (Estimated %)
Alberta 13,476 744,053 17.1% 1.8%
British Columbia 5,496 297,277 5.9% 1.8%
Manitoba 1,096 129,714 9.5% 0.8%
New Brunswick 191 53,010 6.8% 0.4%
Newfoundland and Labrador 269 31,373 6.0% 0.9%
Northwest Territories 5 3,413 7.6% 0.1%
Nova Scotia 1,083 74,986 7.8% 1.4%
Nunavut 0 1,737 4.5% 0.0%
Ontario 41,935 2,789,866 19.3% 1.5%
Prince Edward Island 44 27,059 17.4% 0.2%
Quebec 62,076 1,084,344 12.8% 5.7%
Saskatchewan 1,611 115,914 9.9% 1.4%
Yukon 15 2,518 6.2% 0.6%
Canada 127,310 5,355,340 14.3% 2.4%
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Note. National testing data are collected daily from the national Coronavirus disease (COVID-19) Outbreak update webpage.

Severity

Figure 5. Severe Outcomes of COVID-19 by Week of Public Health Report Date, Manitoba, 2020

Note. ICU admissions are not included in the hospital admissions.

Figure 6. Age Distribution of Severe COVID-19 Cases Compared to All Cases, Manitoba, 2020

Figure 7. Percentage of COVID-19 Cases With Underlying Illnesses, Manitoba, March 12 - August 7, 2020

Note. Musculoskeletal illnesses include osteoporosis, osteoarthritis, rheumatoid arthritis, gout and crystal arthropathies; Immunosuppressed illnesses include organ transplants, immune deficiency; COPD-chronic obstructive pulmonary disease; CVD-cardiovascular disease; Other chronic conditions include cancer, chronic liver disease, obesity, chronic kidney disease. About definitions of chronic conditions

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Risk Factors

Table 3. Source of Infection in Health Care Workers, Manitoba, August 23 – August 29, 2020

Source of infection Cases Percentage
Close contact of known case 43 62.3%
Travel 12 17.4%
Unknown 14 20.3%
All Cases 69

Table 4. Roles of Health Care Workers, Manitoba, August 23 – August 29, 2020

Role Cases
Nurse 17
Health care aide 20
Physician or physician in training 9
Social/Support Workers 5
Medical Clerk 4
Combined Category* 14

Note. The Combined Category counts health care workers in a role with very few cases. These cases are grouped together to keep the identities of these individuals private.

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Outbreaks

Figure 8. Weekly Respiratory and COVID-19 Outbreaks, Manitoba, 2017 – 2020

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FluWatchers

Figure 9. Weekly FluWatchers Participants and Percentage Reporting Fever and Cough, Manitoba, 2020

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Physician Visits

Figure 10. Weekly Percentage of ILI Related Visits to Sentinel Physicians, Manitoba

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ED Visits

Figure 11. Weekly Respiratory Visits to Emergency Department, Winnipeg Regional Health Authority, Manitoba

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Contacts

Figure 5. COVID-19 Contact Summary Table, Manitoba, August 23 – August 29, 2020

Regional Health Authority Active Cases Median Contacts Min contacts Max contacts
Interlake-Eastern Health 6 7.5 1 43
Prairie Mountain Health 247 4.0 0 32
Southern Health - Sante Sud 41 3.0 0 10
Winnipeg Health 164 4.0 0 26

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Symptoms

Figure 12. Percentage of Symptoms Reported by COVID-19 Cases, Manitoba, 2020

Note: Other symptoms include those less common symptoms such as sweating, runny eyes, itchy throat, etc.

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Epidemiology and Surveillance

epiCOVID@gov.mb.ca

Other Epidemiology and Surveillance reports

http://www.gov.mb.ca/health/publichealth/surveillance/index.html