Provincial Respiratory Surveillance Report

COVID-19


This report provides a current epidemiological update on the intensity and severity of COVID-19 in Manitoba. Surveillance and administrative data include laboratory, public health case and contact tracing investigations, hospitalization and mortality data. Data are presented at the provincial and regional level; and include a focussed review on the disproportional impact of COVID-19 on various populations in the province. In this weekly report, we provide regular updates about the current activity of COVID-19 in Manitoba to present a detailed overview about COVID-19 cases and contacts.

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.

For reporting on seasonal influenza in 2021-2022 season, please visit www.gov.mb.ca/health/publichealth/surveillance/influenza/index.html

Week 4 (January 23 – January 29)

About epidemiological week

Data extracted up to 1:00 am on February 4, 2022
Next reporting date: February 14, 2022

COVID-19: High Activity

In Week 4, there were 4,699 laboratory-confirmed COVID-19 cases reported in Manitoba, a decrease from 5,655 in the previous week. The volume of lab tests decreased to on average 2,040 people tested for COVID-19 per day compared to 2,516 in the previous week, and the positivity rate of lab tests was 31.3%, a decrease from 32.8% in the previous week.

In the 4,699 cases reported this week, 48% were reported from the Winnipeg Regional Health Authority and 18% were reported from the Prairie Mountain Health Authority. The remaining cases were reported from Northern Health Region (13%), Interlake-Eastern Regional Health Authority (11%), and Southern Health - Santé Sud Regional Health Authority (10%).

In all Manitoba residents, 81.8% of residents have been partially vaccinated and 75.5% have been fully vaccinated. By January 29, 36.6% have received one additional dose.

Cases

About cases

  • New cases: 4,699
  • Total cases: 120,327
  • Recovered cases: 103,637
More Analyses

Testing

About testing

This week:

  • Average daily specimens: 2,040
  • Weekly positivity rate: 31.3%

Total:

  • Tested people: 700,913
  • Population tested: 51.4%
  • Specimens tested: 1,388,178
  • Positivity rate: 9.3%
More Analyses

Severity

About severity

Severe outcomes associated with COVID-19:

  • Hospitalizations: 7,094
    • ICU admissions3: 1,295
  • Deaths: 1,581
More Analyses

Outbreaks

About outbreaks

2022 COVID-19 outbreaks: 70

  • Outbreaks in long-term care facilities: 35
  • Outbreaks in schools: 0

Total COVID-19 outbreaks: 393

  • Total outbreaks in long-term care facilities: 184
  • Total outbreaks in schools: 33
More Analyses

Exposure

About exposure

Source of infection in cases (% of total):

  • Travel: 1.9%
  • Close contact to cases: 43.5%
  • Unknown: 26.3%
  • Pending: 28.3%
More Analyses

Symptoms

About symptoms

Symptomatic cases: 59.2%

Top symptoms (% of reports):

  • Cough: 46.6%
  • Headache: 35.3%
  • Sore Throat: 30.7%
  • Fever: 29.9%
  • Runny nose: 27.4%
More Analyses

Risk Factors

About risk factors

  • Pregnant cases: 1,072
  • Health care workers4: 5,589
  • Deceased health care workers: 5
  • Recovered health care workers: 5,218
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, August 23, 2020 – January 29, 2022

Note. Deaths due to COVID-19 were aligned by week of death date.
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Figure 2. Sex and Age Distribution of COVID-19 Cases, March 1, 2020 – January 29, 2022

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Figure 3. Incidence Rate (/10,000 Population) of COVID-19 Cases by Age Group and Week of Public Health Report Date, Manitoba, August 23, 2020 – January 29, 2022

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Figure 4. Cases of COVID-19 by Health Region and Public Health Report Date, Manitoba, February 1, 2021 – January 29, 2022

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Table 1. Cases of COVID-19 by Health Region, Manitoba, March 13, 2020 – January 29, 2022

Health Region Total Cases Cases this week Incidence Rate Age-standardized Incidence Rate *
Winnipeg RHA 67877 2264 28.6 28.8
Southern Health-Santé Sud 17580 457 21.6 21.5
Interlake-Eastern RHA 9494 505 37.7 39.0
Prairie Mountain Health 11312 842 48.8 50.4
Northern Health Region 14064 631 81.6 86.3

Note: * Age-standardized rates are used to account for differences in the age structure in health regions. The whole Manitoba population is used as the standard population.

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Figure 5. Vaccination Status in Monthly New Cases, Non-ICU Hospital Admissions, ICU Admissions, and Deaths, Manitoba, December 26, 2021 – January 31, 2022


Note: Content is updated monthly from January 2022 onwards.

Unvaccinated Case: Individuals not vaccinated or vaccinated 0–13 days following the first dose of a COVID-19 vaccine. Partially Vaccinated Case: Individuals vaccinated >=14 days following the first dose of a 2-dose series COVID-19 vaccine if only one dose was received and 0-13 days following the second dose if two doses were received. Fully Vaccinated Case: Individuals vaccinated >=14 days following the second dose of a 2-dose series or first dose of a 1-dose series of a COVID-19 vaccine. After First Booster Dose: Individuals vaccinated >=14 days following one additional dose after completion of primary series.

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Table 2. COVID-19 Cases After Vaccination, Manitoba, December 16, 2020 – January 29, 2022

2a. Cases and Incidence Rate (/100,000 Vaccinated Individuals) After Vaccination, Overall

Partially vaccinated % Incidence Rate Fully vaccinated % Incidence Rate
AZ/COVISHIELD 428 8.2% 518.4 211 0.6% 2550.8
Janssen N/A N/A N/A 56 0.1% 3535.4
Moderna 805 15.5% 379.2 8,269 21.8% 4239.7
Pfizer 1,989 38.3% 255.0 21,000 55.5% 3330.4
Pfizer Pediatric 1,969 37.9% 2808.2 44 0.1% 437.0
Mixed vaccine products N/A N/A N/A 8,269 21.8% 7401.3
Total 5,191 100% 273.8 37,849 100% 2022.8

2b. Cases After Infection by Age Group

Partially vaccinated % Fully vaccinated %
5-11 1,975 38.0% 45 0.1%
12-19 317 6.1% 4,472 11.8%
20-29 483 9.3% 9,168 24.2%
30-39 489 9.4% 7,706 20.4%
40-49 474 9.1% 6,990 18.5%
50-59 546 10.5% 4,968 13.1%
60-69 467 9.0% 2,558 6.8%
70-79 271 5.2% 1,161 3.1%
80+ 170 3.3% 781 2.1%
Total 5,192 100% 37,849 100%

2c. Severe Cases After Infection

Partially vaccinated % Fully vaccinated %
Hospitalizations (including ICU admissions)
5-11 5 1.6% 0 0.0%
12-19 5 1.6% 51 3.6%
20-29 25 7.9% 155 11.0%
30-39 31 9.8% 160 11.4%
40-49 24 7.6% 108 7.7%
50-59 52 16.5% 143 10.2%
60-69 63 19.9% 215 15.3%
70+ 111 35.1% 573 40.8%
Total hospitalizations 316 100% 1,405 100%
Deaths
12-19 0 0.0% 0 0.0%
20-29 0 0.0% 0 0.0%
30-39 1 1.7% 1 0.7%
40-49 0 0.0% 3 2.0%
50-59 14 23.3% 13 8.8%
60-69 15 25.0% 28 19.0%
70+ 30 50.0% 102 69.4%
Total deaths 60 100% 147 100%

2d. Cases After Vaccination by Sex

Partially vaccinated % Fully vaccinated %
Infections in females 2,662 51.3% 19,813 52.4%
Infections in males 2,530 48.7% 18,024 47.6%
Total 5,192 100% 37,837 100%


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Testing

Figure 6. Average Daily Testing Volume and Positivity (%) for COVID-19 by Week of Specimen Receiving Date, Manitoba, August 23, 2020 – January 29, 2022

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Table 3. Cumulative National Testing Volume and Positivity (%) for COVID-19 by Province/Territory, Canada, March 13, 2020 – January 29, 2022

Province Confirmed Cases Tests Completed Test Rate in Population (Estimated %) Positivity Rate (Estimated %)
Alberta 487,436 6,690,166 153.8% 7.3%
British Columbia 320,540 5,402,523 107.0% 5.9%
Manitoba 118,862 1,417,028 103.9% 8.4%
New Brunswick 28,045 690,574 89.2% 4.1%
Newfoundland and Labrador 16,758 538,363 103.0% 3.1%
Northwest Territories 5,614 39,622 88.2% 14.2%
Nova Scotia 36,875 1,697,900 175.6% 2.2%
Nunavut 1,585 30,556 79.0% 5.2%
Ontario 1,021,436 22,367,934 154.4% 4.6%
Prince Edward Island 7,274 254,831 163.7% 2.9%
Quebec 853,120 15,762,508 186.6% 5.4%
Saskatchewan 115,405 1,424,468 121.6% 8.1%
Yukon 3,061 9,129 22.5% 33.5%
Canada 3,016,024 56,325,678 150.6% 5.4%

Note. National testing data are collected daily from the national Coronavirus disease (COVID-19) Outbreak update webpage.

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Severity

Figure 7. Severe Outcomes of COVID-19 by Week of Public Health Report Date, Manitoba, August 23, 2020 – January 29, 2022

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

Figure 8. Age Distribution of Severe COVID-19 Cases Compared to All Cases, Manitoba, March 13, 2020 – January 29, 2022

Figure 9. Percentage of COVID-19 Cases With Underlying Illnesses, Manitoba, March 13, 2020 – January 29, 2022

Note. Musculoskeletal illnesses include: osteoporosis, osteoarthritis, juvenile idiopathic arthritis, gout and crystal Arthropathies; COPD-chronic obstructive pulmonary disease; CVD-cardiovascular disease; Other CVDs include: ischemic heart disease, heart failure, acute myocardial infarction, and stroke; Other chronic conditions include: parkinson’s disease, multiple sclerosis, alzheimer’s disease and epilepsy. About definitions of chronic conditions

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Risk Factors

Table 4. Source of Infection in Health Care Workers with Non-missing Information, Manitoba, March 13, 2020 – January 29, 2022

Source of Infection Cases Percentage
Close contact of known case 2922 52.3%
Pending 314 5.6%
Travel 97 1.7%
Unknown 2256 40.4%
All Cases 5589

Table 5. Roles of Health Care Workers with Non-missing Information, Manitoba, March 13, 2020 – January 29, 2022

Role Cases Percentage
Allied Health, Health Professionals, and Support Staff 3585 64.1%
Nurse/Licensed Practical Nurse 1291 23.1%
Not Identified 498 8.9%
Physician/Physician in training 214 3.8%
All Cases 5589

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Outbreaks

Figure 10. Weekly COVID-19 Outbreaks, Manitoba, 2018 – 2022

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Contacts

Table 6. COVID-19 Contact Summary in All Cases, Manitoba, March 13, 2020 – January 29, 2022

Regional Health Authority Cases Median Contacts Minimum Contacts Maximum Contacts
Winnipeg Health 67877 0 0 249
Southern Health - Sante Sud 17580 1 0 69
Northern Health 14064 0 0 121
Prairie Mountain Health 11312 0 0 134
Interlake-Eastern Health 9494 0 0 76

Table 7. COVID-19 Contact Summary in New Cases Reported in Week 4, Manitoba, 2022

Regional Health Authority Cases Median Contacts Minimum Contacts Maximum Contacts
Winnipeg Health 2264 0 0 3
Prairie Mountain Health 842 0 0 3
Northern Health 631 0 0 9
Interlake-Eastern Health 505 0 0 3
Southern Health - Sante Sud 457 0 0 1

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Symptoms

Figure 11. Percentage of Symptoms Reported by COVID-19 Cases, Manitoba, March 13, 2020 – January 29, 2022

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

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