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 45 (November 7 – November 13)

About epidemiological week

Data extracted up to 1:00 am on November 19, 2021
Next reporting date: November 29, 2021

COVID-19: Increased Activity

In Week 45, there were 1,070 laboratory-confirmed COVID-19 cases reported in Manitoba, an increase from 946 in the previous week. The volume of lab tests decreased to on average 2,761 people tested for COVID-19 per day compared to 2,949 in the previous week, and the positivity rate of lab tests was 6.1%, an increase from 5.1% in the previous week.

In the 1,070 cases reported this week, 39% were reported from the Southern Health - Santé Sud Regional Health Authority and 30% were reported from the Winnipeg Regional Health Authority. The remaining cases were reported from Prairie Mountain Health Authority (13%), Northern Health Region (9%), and Interlake-Eastern Regional Health Authority (9%).

This week, 602 cases of variants of concern (VOCs) have been reported, a decrease from 672 in the previous week. Additionally, cases of VOCs accounted for 56% of new cases reported this week.

In all Manitoba residents aged 12 years and older, 89.3% of residents have been partially vaccinated and 86.0% have been fully vaccinated.

Cases

About cases

  • New cases: 1,070
  • Total cases: 65,616
  • Total VOC cases: 22,445
  • Recovered cases: 63,475
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Testing

About testing

This week

  • Average daily specimens: 2,761
  • Weekly positivity rate: 6.1%

Total

  • Tested people: 617,538
  • Population tested: 45.3%
  • Specimens tested: 1,130,324
  • Positivity rate: 6.3%
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Severity

About severity

Severe outcomes associated with COVID-19:

  • Hospitalizations: 4,657
    • ICU admissions3: 1,016
  • Deaths: 1,280
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Outbreaks

About outbreaks

COVID-19 outbreaks: 273

  • Outbreaks in long-term care facilities: 125
  • Outbreaks in schools: 21
More Analyses

Exposure

About exposure

Source of infection in cases (% of total)

  • Travel: 1.6%
  • Close contact to cases: 54.9%
  • Unknown: 25.8%
  • Pending: 17.7%

Top five outbreak/cluster/special investigation settings4

  • Workplace: 32.5%
  • Industrial setting: 14.4%
  • School: 13.8%
  • Daycare: 8.5%
  • Acute care setting: 7.4%
More Analyses

Transmission and Acquisition

About transmission and acquisition

Top five transmission settings in all cases5

  • Household: 64.4%
  • Social gathering: 14.4%
  • Workplace: 9.9%
  • Transportation: 4.6%
  • School: 2.7%

Top five acquisition settings in cases with unknown source of infection6

  • Household: 47.4%
  • Workplace: 24.0%
  • Social gathering: 14.6%
  • Retail: 8.9%
  • Food services establishments: 5.5%
More Analyses

Symptoms

About symptoms

Symptomatic cases: 73.8%

Top symptoms (% of reports)

  • Cough: 47.1%
  • Headache: 38.3%
  • Fever: 32.3%
  • Muscle pain (myalgia): 28.1%
  • Sore Throat: 27.8%
More Analyses

Risk Factors

About risk factors

  • Pregnant cases: 838
  • Health care workers7: 2,936
  • Deceased health care workers: 4
  • Recovered health care workers: 2,910
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. The top five settings where cases are found to be linked with an outbreak or cluster or special investigation.
  5. Transmission settings include those settings exposed during a case’s communicability period, i.e., 48 hours prior to the development of overt symptoms in the case until the case is classified as no longer infectious. Percentages are calculated using total cases counts as a denominator. Categories are NOT mutually exclusive.
  6. Acquisition settings include those settings exposed during a case’s incubation period, i.e., 14 days before symptom onset date. Percentages are calculated using community-transmitted case counts as a denominator for acquisition settings. Categories are NOT mutually exclusive.
  7. 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 – November 13, 2021

Note. Deaths due to COVID-19 were aligned by week of death date.
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Figure 2. COVID-19 Cases of Variants of Concern (VOC) by Type and Percentage of VOC Cases in All Cases by Week of Public Health Report Date, Manitoba, August 23, 2020 – November 13, 2021

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Figure 3. Sex and Age Distribution of COVID-19 Cases, March 1, 2020 – November 13, 2021

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Figure 4. Incidence Rate (/10,000 Population) of COVID-19 Cases by Age Group and Week of Public Health Report Date, Manitoba, August 23, 2020 – November 13, 2021

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Figure 5. Cases of COVID-19 by Health Region and Public Health Report Date, Manitoba, December 1, 2020 – November 13, 2021

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Table 1. Cases of COVID-19 by Health Region, Manitoba, March 13, 2020 – November 13, 2021

Health Region Total Cases Cases this week Incidence Rate Age-standardized Incidence Rate *
Winnipeg RHA 35978 324 4.1 4.1
Southern Health-Santé Sud 10642 422 19.9 20.4
Interlake-Eastern RHA 4864 93 6.9 7.2
Prairie Mountain Health 4990 134 7.8 7.7
Northern Health Region 9142 97 12.6 11.4

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 6. Vaccination Status in New Cases 12+, non-ICU Hospital Admissions, ICU Admissions, Deaths, and VOCs, Manitoba, November 7, 2021 – November 13, 2021

Note: Unprotected Case: Individuals 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.

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Table 2. COVID-19 Cases After Vaccination, Manitoba, December 16, 2020 – November 13, 2021


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

Partially vaccinated % Incidence Rate Fully vaccinated % Incidence Rate
AZ/COVISHIELD 408 16.9% 499.9 32 1.2% 432.0
Janssen N/A N/A N/A 10 0.4% 1718.2
Moderna 560 23.2% 270.3 913 33.3% 485.7
Pfizer 1,448 59.9% 190.3 1,348 49.1% 222.5
Mixed vaccine products N/A N/A N/A 438 16.0% 428.7
Total 2,416 100% 230.0 2,743 100% 271.2


2b. Cases After Infection by Age Group

Partially vaccinated % Fully vaccinated %
12-19 154 6.4% 186 6.8%
20-29 282 11.7% 371 13.5%
30-39 304 12.6% 511 18.6%
40-49 351 14.5% 498 18.2%
50-59 457 18.9% 400 14.6%
60-69 454 18.8% 350 12.8%
70-79 249 10.3% 211 7.7%
80+ 165 6.8% 216 7.9%
Total 2,416 100% 2,743 100%


2c. Severe Cases After Infection

Partially vaccinated % Fully vaccinated %
Hospitalizations (including ICU admissions)
12-19 1 0.4% 3 1.6%
20-29 14 6.0% 5 2.6%
30-39 13 5.6% 8 4.2%
40-49 13 5.6% 11 5.8%
50-59 36 15.5% 20 10.5%
60-69 50 21.6% 42 22.0%
70+ 105 45.3% 102 53.4%
Total hospitalizations 232 100% 191 100%
Deaths
12-19 0 0.0% 0 0.0%
20-29 0 0.0% 0 0.0%
30-39 0 0.0% 0 0.0%
40-49 0 0.0% 1 2.9%
50-59 9 19.1% 2 5.7%
60-69 9 19.1% 7 20.0%
70+ 29 61.7% 25 71.4%
Total deaths 47 100% 35 100%


2d. Cases After Vaccination by Sex

Partially vaccinated % Fully vaccinated %
Infections in females 1,281 53.0% 1,513 55.2%
Infections in males 1,135 47.0% 1,230 44.8%
Total 2,416 100% 2,743 100%


2e. Cases After Vaccination by VOC

Partially vaccinated % Fully vaccinated %
B.1.1.7 - Alpha 524 21.7% 80 2.9%
B.1.6.1.7.2 - Delta 189 7.8% 363 13.2%
Other 36 1.5% 10 0.4%
Unspecified 841 34.8% 1,314 47.9%
Non-VOC 826 34.2% 976 35.6%
Total 2,416 100% 2,743 100%

Note. Other VOCs include AY.3 (Delta Plus), B.1.351 (Beta), B.1.617, B.1.617.2 (Kappa), and P.1 (Gamma).

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Testing

Figure 7. Average Daily Testing Volume and Positivity (%) for COVID-19 by Week of Specimen Receiving Date, Manitoba, August 23, 2020 – November 13, 2021

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Table 3. Cumulative National Testing Volume and Positivity (%) for COVID-19 by Province/Territory, Canada, March 13, 2020 – November 13, 2021

Province Confirmed Cases Tests Completed Test Rate in Population (Estimated %) Positivity Rate (Estimated %)
Alberta 329,030 5,962,912 137.1% 5.5%
British Columbia 211,750 4,396,260 87.1% 4.8%
Manitoba 65,371 1,169,902 85.7% 5.6%
New Brunswick 7,069 547,201 70.7% 1.3%
Newfoundland and Labrador 2,025 389,137 74.4% 0.5%
Northwest Territories 1,951 35,403 78.8% 5.5%
Nova Scotia 7,815 1,345,309 139.2% 0.6%
Nunavut 674 22,164 57.3% 3.0%
Ontario 605,846 19,126,637 132.1% 3.2%
Prince Edward Island 327 223,105 143.3% 0.1%
Quebec 432,991 12,824,655 151.8% 3.4%
Saskatchewan 79,334 1,244,107 106.2% 6.4%
Yukon 1,153 9,129 22.5% 12.6%
Canada 1,745,349 47,295,997 126.4% 3.7%

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

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Severity

Figure 8. Severe Outcomes of COVID-19 by Week of Public Health Report Date, Manitoba, August 23, 2020 – November 13, 2021

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

Figure 9. Age Distribution of Severe COVID-19 Cases Compared to All Cases, Manitoba, March 13, 2020 – November 13, 2021

Figure 10. Percentage of COVID-19 Cases With Underlying Illnesses, Manitoba, March 13, 2020 – November 13, 2021

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 – November 13, 2021

Source of Infection Cases Percentage
Close contact of known case 1675 57.1%
Pending 214 7.3%
Travel 41 1.4%
Unknown 1006 34.3%
All Cases 2936

Table 5. Roles of Health Care Workers with Non-missing Information, Manitoba, March 13, 2020 – November 13, 2021

Role Cases Percentage
Allied Health, Health Professionals, and Support Staff 1796 61.2%
Nurse/Licensed Practical Nurse 749 25.5%
Not Identified 233 7.9%
Physician/Physician in training 100 3.4%
First Responder 58 2%
All Cases 2936

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Outbreaks

Figure 11. Weekly COVID-19 Outbreaks, Manitoba, 2018 – 2021

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Contacts

Table 6. COVID-19 Contact Summary in All Cases, Manitoba, March 13, 2020 – November 13, 2021

Regional Health Authority Cases Median Contacts Minimum Contacts Maximum Contacts
Winnipeg Health 35978 3 0 249
Southern Health - Sante Sud 10642 2 0 69
Northern Health 9142 1 0 121
Prairie Mountain Health 4990 3 0 134
Interlake-Eastern Health 4864 2 0 76

Table 7. COVID-19 Contact Summary in New Cases Reported in Week 45, Manitoba, 2021

Regional Health Authority Cases Median Contacts Minimum Contacts Maximum Contacts
Southern Health - Sante Sud 422 2 0 38
Winnipeg Health 324 4 0 38
Prairie Mountain Health 134 4 0 40
Northern Health 97 0 0 35
Interlake-Eastern Health 93 5 0 40

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Figure 12. Percentage of COVID-19 Cases Linked to Top-five Cluster/Outbreak/Special Investigation Settings, Manitoba, January 24, 2021 – November 13, 2021

Note: COVID-19 public health orders in Manitoba since January 23, 2021: PH order #1 (effective January 23, 2021), PH order #2 (effective March 5, 2021), PH order #3 (effective March 26, 2021), PH order #4 (effective April 19, 2021), PH order #5 (effective April 28, 2021), PH order #6 (effective May 9, 2021), PH order #7 (effective May 22, 2021), PH order #8 (effective May 29, 2021), PH order #9 (effective June 12, 2021), PH order #10 (effective June 26, 2021), PH order #11: (effective July 17, 2021), PH order #12: (effective August 7, 2021), PH order #13: (effective August 28, 2021), PH order #14: (effective October 5, 2021). Content of Public Health Orders

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Figure 13. Percentage of Total COVID-19 Cases Exposed to Top-five Transmission Settings, Manitoba, January 24, 2021 – November 13, 2021

Note: COVID-19 public health orders in Manitoba since January 23, 2021: PH order #1 (effective January 23, 2021), PH order #2 (effective March 5, 2021), PH order #3 (effective March 26, 2021), PH order #4 (effective April 19, 2021), PH order #5 (effective April 28, 2021), PH order #6 (effective May 9, 2021), PH order #7 (effective May 22, 2021), PH order #8 (effective May 29, 2021), PH order #9 (effective June 12, 2021), PH order #10 (effective June 26, 2021), PH order #11: (effective July 17, 2021), PH order #12: (effective August 7, 2021), PH order #13: (effective August 28, 2021), PH order #14: (effective October 5, 2021). Content of Public Health Orders

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Figure 14. Percentage of Community-transmitted COVID-19 Cases Exposed to Top-five Acquisition Settings, Manitoba, January 24, 2021 – November 13, 2021

Note: COVID-19 public health orders in Manitoba since January 23, 2021: PH order #1 (effective January 23, 2021), PH order #2 (effective March 5, 2021), PH order #3 (effective March 26, 2021), PH order #4 (effective April 19, 2021), PH order #5 (effective April 28, 2021), PH order #6 (effective May 9, 2021), PH order #7 (effective May 22, 2021), PH order #8 (effective May 29, 2021), PH order #9 (effective June 12, 2021), PH order #10 (effective June 26, 2021), PH order #11: (effective July 17, 2021), PH order #12: (effective August 7, 2021), PH order #13: (effective August 28, 2021), PH order #14: (effective October 5, 2021). Content of Public Health Orders

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Symptoms

Figure 15. Percentage of Symptoms Reported by COVID-19 Cases, Manitoba, March 13, 2020 – November 13, 2021

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

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