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Data up to end of day on April 8, 2020


   Cases over time

140

COVID-19 cases reported to Halton Region Public Health since the last update (125 confirmed + 15 probable)

264

COVID-19 cases reported to Halton Region Public Health to date (249 confirmed + 15 probable)

Figure 1: COVID-19 cases, by reported date, Halton Region, Mar. 1-Apr. 8, 2020
Figure 1 shows the 264 COVID-19 cases that had been reported to Halton Region Public Health by end of the day on April 8. All cases have been graphed according to the date they were reported, which is often several days after the onset of symptoms. Among the cases in this figure, 140 were reported since the last update (meaning they were reported between April 2 and April 8, 2020).

Individuals who are lab-confirmed cases are shown in green. Individuals who are probable cases are shown in orange. Probable cases are epi-linked cases, which means they are presumed to have COVID-19 because they are symptomatic close contacts of cases or returning travelers who have COVID-19 symptoms.


   Case demographics

Figure 2: COVID-19 cases, by age and sex, Halton Region, 2020
Figure 2 shows that by end of the day on April 8, the most COVID-19 cases were among Halton residents aged 40-59 (with 113 cases, or 43%). 144 of the 264 cases (55%) were female. Please note age groups have shifted since the last report, to align with provincial reporting.
Figure 3: COVID-19 cases, by municipality of residence, Halton Region, 2020
Figure 3 shows that by end of the day on April 8, the greatest number of COVID-19 cases were among residents of Oakville (with 102 cases, or 39%). Please note that because Burlington and Oakville have larger populations, it is expected that they have more cases.


   Case exposure source

Figure 4: Percentage of COVID-19 cases, by exposure source, Halton Region, 2020

Figure 4 shows that by end of the day on April 8, 106 of Halton Region's COVID-19 cases (40%) had no known travel or contact history, and therefore were believed to have acquired the virus within Ontario, making them community cases. 68 of the cases (26%) had a history of travel that was believed to have been the source of their infection. 56 cases (21%) had contact with a confirmed case that was believed to be the source of infection. Information on exposure source was pending for 34 cases (13%).


   Case outcomes

38

Halton cases of COVID-19 have ever been hospitalized to date

69

Halton cases of COVID-19 have recovered to date

4

Halton cases of COVID-19 have died to date


   Institutional outbreaks

5

institutional outbreaks of COVID-19 reported to Halton Region Public Health since the last update

6

institutional outbreaks of COVID-19 reported to Halton Region Public Health to date

Among the six institutional outbreaks reported to date, four (67%) have been in retirement homes, while the remainder have occurred in long-term care homes. Five of the outbreaks were reported since the last update (meaning they were reported between April 2 and April 8, 2020). None of the outbreaks have yet been declared over.


   Comparison to Ontario

5,759

total confirmed COVID-19 cases reported in Ontario to date

Figure 5: Age-specific rates of COVID-19 (per 10,000 population), Halton Region and Ontario, 2020
Figure 5 shows age-specific rates of COVID-19 for Halton and Ontario. Rates take into account the population size of each age group to make it possible to compare between different areas. Halton's age-specific rates are similar to the provincial rates, except for residents aged 80+. Currently, Halton has a statistically significantly lower rate of COVID-19 cases for residents aged 80+ compared to Ontario, with 6.3 cases per 10,000 residents aged 80+ in Halton, compared to 10.9 cases per 10,000 residents aged 80+ in Ontario. It is important to note that this may change as the pandemic evolves and numbers increase.

Data limitations

Data sources

All Halton case data: integrated Public Health Information System (iPHIS), extracted at 7:00 AM on April 9, 2020, to reflect data entered by the end of the day on April 8, 2020

Ontario case data: Public Health Ontario, Epidemiologic Summary, COVID-19 in Ontario: January 15, 2020 to April 8, 2020, posted on April 9, 2020 to https://www.ontario.ca/page/2019-novel-coronavirus

Denominators for Halton and Ontario age-specific rates: Population projections [2020], IntelliHEALTH Ontario, extracted on April 8, 2020.

Data notes

All cases of diseases of public health significance diagnosed in Ontario are entered into iPHIS by local public health units. iPHIS is the Integrated Public Health Information System. It is a dynamic disease reporting system which allows ongoing updates to data previously entered. As a result, data extracted from iPHIS represent a snapshot at the time of extraction and may differ from previous or subsequent reports as data are updated.

The data only represent cases reported to public health and recorded in iPHIS. As a result, all counts will be subject to varying degrees of underreporting due to a variety of factors, such as disease awareness and medical care seeking behaviours, which may depend on severity of illness, clinical practice, changes in laboratory testing, and reporting behaviours.

Cases are included if their “diagnosing health unit” in iPHIS is Halton Region, which means counts include only individuals whose primary residence is in Halton Region. The case may not necessarily have been managed by Halton Region, if they were temporarily residing elsewhere during their case management period. Cases managed by Halton Region who normally live elsewhere but who were managed by Halton Region staff because they were temporarily residing in Halton during their case management period have not been included.

Cases for which the Disposition Status in iPHIS was reported as ENTERED IN ERROR, DOES NOT MEET DEFINITION, DUPLICATE-DO NOT USE, or any variation on these values have been excluded.

Figure 1 distinguishes between lab-confirmed and probable cases. Since April 7, probable cases are defined as epi-linked cases, meaning they are symptomatic close contacts of cases or returning travelers who have COVID-19 symptoms and therefore are presumed to have COVID-19. All other figures and numbers include both confirmed and probable cases combined.

In subsequent reports, counts in Figure 1 may increase as cases are added from past dates due to delayed data entry or new arrival of lab results. To minimize such retrospective changes, cases have been graphed according to case reported date, which does not reflect onset of illness.

Exposure type is determined by examining the exposure and risk factor fields from iPHIS to determine whether a case travelled, was a contact of a case or neither. A hierarchy has been applied as follows: Travel-related > Close contact of a confirmed case > Neither (indicating community acquisition) > Information pending.

Case outcomes (hospitalizations, recovery, deaths) reflect the latest available information reported to Halton Region Public Health and recorded in iPHIS by the extraction time.

Institutional outbreaks include outbreaks of COVID-19 in settings such as long-term care homes, retirement homes, and prisons.

For daily Halton case tables and up-to-date information about how to protect yourself and others, please visit halton.ca/covid19

For daily provincial epidemiologic summaries and more information on COVID-19 in Ontario, please visit Ontario.ca/coronavirus

For national information on COVID-19 in Canada, please visit Canada.ca/coronavirus
Copyright © 2020 Halton Region Health Department, All rights reserved.


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