Provincial Respiratory Surveillance Report

COVID-19 and Seasonal Influenza

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.

Epidemiology and Surveillance also continues to monitor the activity of seasonal influenza in Manitoba during this pandemic. During the 2020–2021 influenza season, routine reporting of seasonal influenza is included in this weekly report.

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

• To understand COVID-19 within the respiratory context;
• To present a detailed overview about COVID-19 cases and contacts; and
• To continue monitor and report on seasonal influenza during the pandemic.

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.

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Week 3 (January 17 – January 23)

About epidemiological week

Data extracted up to 4:00am on January 29, 2021
Next reporting date: February 8, 2021

COVID-19: High Activity In Week 3, there were 1,219 laboratory-confirmed COVID-19 cases reported in Manitoba, a slight increase from 1,194 in the previous week. The volume of lab tests decreased to on average 1,837 people tested for COVID-19 per day compared to 1,888 in the previous week, and the positivity rate of lab tests was 10.3%, similar to the previous week. In an examination of the 1,219 cases reported this week, majority (47%) were reported from the Northern Health Region and 30% were reported from the Winnipeg Regional Health. The remaining cases were reported from Interlake-Eastern Regional Health Authority (10%), Prairie Mountain Health Authority (7%) and Southern Health - Santé Sud Regional Health Authority (5%). Overall, older adults and those with underlying illnesses are at higher risk for severe outcomes as a result of COVID-19 infection. As of January 23, a total of 28,941 doses of COVID19 vaccines have been administrated to the residents of Manitoba.		Cases About cases New cases: 1,219 Total cases: 28,729 Recovered cases: 24,945 More Analyses Epi curve Daily Case Counts (.csv) Age and sex Health region National update
Testing About testing This week Average daily specimens: 1,837 Weekly positivity rate: 10.3% Total Tested people: 337,470 Population tested: 24.7% Specimens tested: 465,046 Positivity rate: 6.6% More Analyses Provincial testing National testing	Severity About severity Severe outcomes associated with COVID-19: Hospitalizations: 1,982 ICU admissions: 383 Deaths: 823 More Analyses Severe Outcomes Age Underlying Illness	Outbreaks About outbreaks COVID-19 outbreaks: 177 Outbreaks in long-term care facilities: 95 Outbreaks in schools: 3 More Analyses Check trend Outbreak list
Exposure About exposure Source of infection in cases (% of total) Travel: 1.2% Close contact to cases: 52.0% Unknown: 23.4% Pending: 23.3% Close contacts Top contact type: Household exposure More Analyses Contacts	Risk Factors About risk factors Pregnant cases: 304 Health care workers**: 1845 Deceased Health care workers: 2 Recovered health care workers: 1808 More Analyses Health care workers	Symptoms About symptoms Symptomatic cases: 71.6% Top symptoms (% of reports) Cough: 44.7% Headache: 37.7% Fever: 30.3% Muscle pain (myalgia): 28.9% Sore Throat: 26.7% More Analyses All symptoms
Seasonal Influenza: Low Activity A large number of respiratory specimens continued to be tested for seasonal influenza. There were no laboratory-confirmed influenza cases reported in Manitoba in Week 3. As of January 23, 30.6% of residents in Manitoba have been immunized with seasonal influenza vaccines.		Influenza Cases About cases New cases this week Influenza A: 0 Influenza B: 0 Total cases from September 1, 2020 Influenza A: 0 Influenza B: 1
Syndromic Indicators: Low Activity The respiratory activity levels in the community, primary care and emergency rooms continued to be low for this time of a year. The number of respiratory outbreaks reported that were not due to COVID-19 remains low.		FluWatchers About FluWatchers Participants reporting: 594 Reporting fever and cough: 0.2% Check Trend
Physician Visits About sentinal physicians Influenza Like Illness (ILI) Visits to sentinel physicians: 0.0% Check Trend	Antiviral About Antiviral Units of antiviral dispensed from pharmacies: 0	ED Visits About emergency room visits Average daily respiratory visits to emergency department (ED): 82 Check Trend
Important Notes Data about COVID-19 cases and contacts aswell as influenza cases are extracted from PHIMS. 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. *ICU admissions were also included in hospitalizations. **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 – 2021

Note. Deaths due to COVID-19 were aligned by week of death date.
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Figure 2. Cases of COVID-19 by Sex and Age Group, Manitoba, 2020 – 2021

Figure 3. Cases of COVID-19 by Health Region and Public Health Report Date, Manitoba, 2020 – 2021

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

Health Region	Cases	Percentage
Winnipeg RHA	16543	57.6%
Southern Health-Santé Sud	4592	16.0%
Interlake-Eastern RHA	2152	7.5%
Prairie Mountain Health	1895	6.6%
Northern Health Region	3547	12.3%

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Testing

Figure 4. Average Daily Testing Volume and Positivity (%) for COVID-19 by Week of Specimen Receiving Date, Manitoba, 2020 – 2021

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Table 2. Cumulative National Testing Volume and Positivity (%) for COVID-19 by Province/Territory, Canada, 2020 – 2021

Province	Confirmed Cases	Tests Completed	Tested Population (Estimated %)	Positivity Rate (Estimated %)
Alberta	119,757	3,061,844	70.4%	3.9%
British Columbia	63,484	1,044,931	20.7%	6.1%
Manitoba	28,260	448,638	32.9%	6.3%
New Brunswick	1,087	133,199	17.2%	0.8%
Newfoundland and Labrador	398	77,472	14.8%	0.5%
Northwest Territories	31	9,064	20.2%	0.3%
Nova Scotia	1,570	200,424	20.7%	0.8%
Nunavut	267	7,241	18.7%	3.7%
Ontario	250,226	8,895,862	61.4%	2.8%
Prince Edward Island	110	88,407	56.8%	0.1%
Quebec	250,491	2,695,925	31.9%	9.3%
Saskatchewan	21,643	327,151	27.9%	6.6%
Yukon	70	6,216	15.3%	1.1%
Canada	737,407	16,996,450	45.4%	4.3%

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

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Severity

Figure 5. Severe Outcomes of COVID-19 by Week of Public Health Report Date, Manitoba, 2020 – 2021

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 – 2021

Figure 7. Percentage of COVID-19 Cases With Underlying Illnesses, Manitoba, 2020 – 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 3. Source of Infection in Health Care Workers with Non-missing Information, Manitoba, 2020 – 2021

Source of infection	Cases	Percentage
Close contact of known case	1102	59.7%
Pending	182	9.9%
Travel	13	0.7%
Unknown	548	29.7%
All Cases	1845

Table 4. Roles of Health Care Workers with Non-missing Information, Manitoba, 2020 – 2021

Role	Cases	Percentage
Allied Health and Support Staff	1064	57.7%
Nurse/Licensed Practical Nurse	530	28.7%
Not identified	141	7.6%
Physician/Physician in training	71	3.8%
First Responder	39	2.1%
All Cases	1845

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Outbreaks

Figure 8. Weekly Respiratory and COVID-19 Outbreaks, Manitoba, 2018 – 2021

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Contacts

Table 5. COVID-19 Contact Summary Table, Manitoba, 2020 – 2021

Regional Health Authority	Active Cases	Median Contacts	Min contacts	Max contacts
Northern Health	1599	0	0	47
Winnipeg Health	685	0	0	37
Interlake-Eastern Health	357	0	0	16
Southern Health - Sante Sud	184	0	0	19
Prairie Mountain Health	135	0	0	17

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Symptoms

Figure 9. Percentage of Symptoms Reported by COVID-19 Cases, Manitoba, 2020 – 2021

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

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FluWatchers

Figure 10. Weekly FluWatchers Participants and Percentage Reporting Fever and Cough, Manitoba, 2021

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Physician Visits

Figure 11. Weekly Percentage of ILI Related Visits to Sentinel Physicians, Manitoba, 2021

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ED Visits

Figure 12. Weekly Respiratory Visits to Emergency Department, Winnipeg Regional Health Authority, Manitoba, 2018 – 2021

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Epidemiology and Surveillance

epiCOVID@gov.mb.ca

Other Epidemiology and Surveillance reports

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