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 10 (March 6 – March 12)

About epidemiological week

Data extracted up to 1:00 am on March 18, 2022
Next reporting date: March 24, 2022

COVID-19: Decreasing Activity

In Week 10, there were 1,115 laboratory-confirmed COVID-19 cases reported in Manitoba, a decrease from 1,137 in the previous week. The volume of lab tests decreased to on average 1,010 people tested for COVID-19 per day compared to 1,102 in the previous week, and the positivity rate of lab tests was 14.0%, an increase from 13.2% in the previous week.

In the 1,115 cases reported this week, 43% were reported from the Winnipeg Regional Health Authority and 22% were reported from the Northern Health Region. The remaining cases were reported from Prairie Mountain Health Authority (13%), Southern Health - Santé Sud Regional Health Authority (12%), and Interlake-Eastern Regional Health Authority (10%).

In all Manitoba residents, 82.6% of residents have been partially vaccinated and 78.2% have been fully vaccinated. By February 28th, 41.0% have received one additional dose.

Cases

About cases

  • New cases: 1,115
  • Total cases: 132,992
  • Recovered cases: 127,799
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Testing

About testing

This week:

  • Average daily specimens: 1,010
  • Weekly positivity rate: 14%

Total:

  • Tested people: 714,773
  • Population tested: 52.4%
  • Specimens tested: 1,439,651
  • Positivity rate: 9.6%
More Analyses

Severity

About severity

Severe outcomes associated with COVID-19:

  • Hospital admissions: 8,389
    • ICU admissions3: 1,403
  • Deaths: 1,721
More Analyses

Outbreaks

About outbreaks

2022 COVID-19 outbreaks: 103

  • Outbreaks in long-term care facilities: 53
  • Outbreaks in schools: 0

Total COVID-19 outbreaks: 427

  • Total outbreaks in long-term care facilities: 203
  • Total outbreaks in schools: 33
More Analyses

Exposure

About exposure

Source of infection in cases (% of total):

  • Travel: 2.0%
  • Close contact to cases: 41.5%
  • Unknown: 26.2%
  • Pending: 30.2%
More Analyses

Symptoms

About symptoms

Symptomatic cases: 54.5%

Top symptoms (% of reports):

  • Cough: 44.2%
  • Headache: 33.3%
  • Sore Throat: 29.2%
  • Fever: 28.3%
  • Runny nose: 26.0%
More Analyses

Risk Factors

About risk factors

  • Pregnant cases: 1,162
  • Health care workers4: 5,591
  • Deceased health care workers: 5
  • Recovered health care workers: 5,579
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 – March 12, 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 – March 12, 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 – March 12, 2022

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Figure 4. Cases of COVID-19 by Health Region and Public Health Report Date, Manitoba, April 1, 2021 – March 12, 2022

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Table 1. Cases of COVID-19 and Incidence Rate (/10,000 population) by Health Region, Manitoba, March 13, 2020 – March 12, 2022

Health Region Total Cases Cases this week Incidence Rate Age-standardized Incidence Rate *
Winnipeg RHA 72,455 478 6.0 5.9
Southern Health-Santé Sud 18,775 130 6.1 6.3
Interlake-Eastern RHA 10,933 113 8.4 8.8
Prairie Mountain Health 13,349 146 8.5 8.2
Northern Health Region 17,480 248 32.1 32.3

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 Hospital Admissions, ICU Admissions, and Deaths, Manitoba, February 1, 2022 – February 28, 2022


Note: Content is updated monthly from January 2022 onwards. Hospital admissions include ICU admissions.

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 – March 12, 2022

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

Partially vaccinated Incidence Rate Fully Vaccinated Incidence Rate After First Booster Dose Incidence Rate
Asymptomatic 2,290 198.0 18,518 1690.4 3,890 676.5
Symptomatic 3,358 290.3 22,917 2091.9 4,887 849.9
All 5,648 488.4 41,435 3782.3 8,777 1526.4

2b. Cases After Infection by Age Group

Partially vaccinated % Fully vaccinated % After First Booster Dose %
5-11 2,280 40.4% 152 0.4% 0 0.0%
12-19 337 6.0% 5,077 12.3% 101 1.2%
20-29 513 9.1% 9,932 24.0% 981 11.2%
30-39 538 9.5% 8,477 20.5% 1,374 15.7%
40-49 488 8.6% 7,559 18.2% 1,702 19.4%
50-59 563 10.0% 5,362 12.9% 1,498 17.1%
60-69 474 8.4% 2,730 6.6% 1,097 12.5%
70-79 278 4.9% 1,266 3.1% 746 8.5%
80+ 178 3.2% 879 2.1% 1,278 14.6%
Total 5,649 100% 41,434 100% 8,777 100%

2c. Severe Cases After Infection

Partially vaccinated % Fully vaccinated % After First Booster Dose %
Hospital Admissions
5-11 9 2.1% 2 0.1% 0 0.0%
12-19 7 1.6% 83 4.2% 4 0.7%
20-29 35 8.0% 243 12.3% 17 2.8%
30-39 50 11.5% 242 12.2% 42 7.0%
40-49 30 6.9% 178 9.0% 39 6.5%
50-59 76 17.5% 217 11.0% 55 9.2%
60-69 88 20.2% 309 15.6% 121 20.1%
70+ 140 32.2% 704 35.6% 323 53.7%
Total hospitalizations 435 100% 1,978 100% 601 100%
ICU Admissions
5-11 1 1.4% 0 0.0% 0 0.0%
12-19 1 1.4% 2 1.3% 1 2.3%
20-29 1 1.4% 12 7.6% 1 2.3%
30-39 3 4.3% 10 6.4% 1 2.3%
40-49 3 4.3% 24 15.3% 6 14.0%
50-59 18 25.7% 30 19.1% 4 9.3%
60-69 23 32.9% 41 26.1% 13 30.2%
70+ 20 28.6% 38 24.2% 17 39.5%
Total ICU admissions 70 100% 157 100% 43 100%
Deaths
12-19 0 0.0% 0 0.0% 0 0.0%
20-29 1 1.6% 2 1.0% 0 0.0%
30-39 1 1.6% 1 0.5% 0 0.0%
40-49 0 0.0% 5 2.5% 2 2.1%
50-59 14 22.2% 17 8.6% 1 1.1%
60-69 15 23.8% 39 19.8% 11 11.7%
70+ 32 50.8% 133 67.5% 80 85.1%
Total deaths 63 100% 197 100% 94 100%

2d. Cases After Vaccination by Sex

Partially vaccinated % Fully vaccinated % After First Booster Dose %
Infections in females 2,902 51.4% 21,732 52.5% 5,410 61.6%
Infections in males 2,747 48.6% 19,688 47.5% 3,366 38.4%
Total 5,649 100% 41,420 100% 8,776 100%


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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 – March 12, 2022

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Table 3. Cumulative National Testing Volume and Positivity (%) for COVID-19 by Province/Territory, Canada, March 13, 2020 – March 12, 2022

Province Confirmed Cases Tests Completed Test Rate in Population (Estimated %) Positivity Rate (Estimated %)
Alberta 530,761 6,863,227 157.7% 7.7%
British Columbia 352,039 5,717,962 113.3% 6.2%
Manitoba 132,681 1,469,586 107.7% 9.0%
New Brunswick 41,512 748,245 96.7% 5.5%
Newfoundland and Labrador 29,365 594,412 113.7% 4.9%
Northwest Territories 9,514 40,309 89.8% 23.6%
Nova Scotia 48,471 1,788,191 185.0% 2.7%
Nunavut 3,265 37,267 96.4% 8.8%
Ontario 1,121,694 23,113,569 159.6% 4.9%
Prince Edward Island 19,703 256,965 165.1% 7.7%
Quebec 934,622 16,573,701 196.2% 5.6%
Saskatchewan 129,301 1,492,808 127.5% 8.7%
Yukon 3,555 9,129 22.5% 38.9%
Canada 3,356,496 58,705,447 156.9% 5.7%

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 – March 12, 2022

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

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Figure 8. Age Distribution of Severe COVID-19 Cases Compared to All Cases, Manitoba, March 13, 2020 – March 12, 2022

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Figure 9. Percentage of COVID-19 Cases With Underlying Illnesses, Manitoba, March 13, 2020 – March 12, 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 – March 12, 2022

Source of Infection Cases Percentage
Close contact of known case 2,920 52.2%
Pending 324 5.8%
Travel 98 1.8%
Unknown 2,249 40.2%
All Cases 5,591

Table 5. Roles of Health Care Workers with Non-missing Information, Manitoba, March 13, 2020 – March 12, 2022

Role Cases Percentage
Allied Health, Health Professionals, and Support Staff 3,586 64.1%
Nurse/Licensed Practical Nurse 1,290 23.1%
Not Identified 500 8.9%
Physician/Physician in training 214 3.8%
All Cases 5,591

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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 – March 12, 2022

Regional Health Authority Cases Median Contacts Minimum Contacts Maximum Contacts
Winnipeg Health 72,455 0 0 249
Southern Health-Santé Sud 18,775 0 0 69
Northern Health 17,480 0 0 121
Prairie Mountain Health 13,349 0 0 134
Interlake-Eastern Health 10,933 0 0 76

Table 7. COVID-19 Contact Summary in New Cases Reported in Week 10, Manitoba, 2022

Regional Health Authority Cases Median Contacts Minimum Contacts Maximum Contacts
Winnipeg Health 478 0 0 0
Northern Health 248 0 0 0
Prairie Mountain Health 146 0 0 0
Southern Health-Santé Sud 130 0 0 0
Interlake-Eastern Health 113 0 0 0

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Symptoms

Figure 11. Percentage of Symptoms Reported by COVID-19 Cases, Manitoba, March 13, 2020 – March 12, 2022

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

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