1.0 DCPLUS 20200921 20151500 20250828 20151500 https://www.arcgis.com/sharing/rest/content/items/26c902bf1da44d3d90b099392b544b81/info/thumbnail/table5.png https://www.arcgis.com/home/item.html?id=26c902bf1da44d3d90b099392b544b81 26c902bf1da44d3d90b099392b544b81 CSV COVID-19 Ottawa Residents Tested 2020-09-21T20:15:15 2025-08-28T16:01:00 cases percent positivity testing long-term care home Community Health and Safety A city that has affordable housing and is more liveable for all Daily number of Ottawa residents tested for COVID-19 and the percentage of residents tested with laboratory-confirmed COVID-19. Daily number of Ottawa residents tested for COVID-19 and the percentage of residents tested with laboratory-confirmed COVID-19. Data are based on information extracted from the Ontario Laboratories Information System (OLIS) on Thursdays.  Accuracy: Points of consideration for interpretation of the data:   <ul><li>Not all labs report to OLIS and only patients with health card numbers are included in the OLIS dataset.</li><li>Once an individual is confirmed positive, subsequent tests for that individual are excluded from the daily totals.</li><li>Duplicate tests are excluded from the total number of positive tests, including those that arose from multiple tests of cure. </li><li>Results for patients who placed an OLIS consent block (~50 records province-wide) are excluded.  </li><li>Staff working in long-term care homes are not captured in OLIS.</li><li>City assignment in OLIS is based on the patient's health card address. Patients living in long-term care homes may not have the correct address associated with their health cards; therefore, not all tests in long-term care homes may be captured.</li><li>Confirmed cases are those with a confirmed COVID-19 laboratory result as per the Ministry of Health Public health management of cases and contacts of COVID-19 in Ontario. March 25, 2020 version 6.0.</li><li>The province has had to limit testing to priority groups in the early stages of the pandemic. Since only a small fraction of all the persons who were infected with the COVID-19 virus were tested, the number of reported confirmed community cases underestimates the actual number of infections. Information on overall infection rates in Canada will not be available until large studies on COVID-19 antibody presence in blood serum are conducted. Based on available information, the actual number of infections may lie from 5 to 30 times or more than the reported number of cases (1).</li><li>Surveillance testing for COVID-19 began in long term care facilities on April 25, 2020.</li></ul>Reference:   <ol><li>Richterich P. Severe underestimation of COVID-19 case numbers: Effect of epidemic growth rate and test restrictions. medRxiv. April 2020: 2020.04.13. doi.org/10.1101/2020.04.13.20064220</li></ol>Update Frequency: Thursdays<div> Attributes: Data fields:   <ul><li>Date – date of the test (YYYY-MM-DD).</li><li>Number of tests – number of Ottawa residents tested for COVID-19</li><li>Daily % Positivity – number of Ottawa residents tested on that day that received a positive test result for COVID-19 divided by the total number of Ottawa residents tested on that day</li><li>Number of tests in LTCH– number of Ottawa residents in long-term care homes who were tested for COVID-19</li><li>LTCH Daily % Positivity – number of Ottawa residents in long-term care homes tested on that day that received a positive test result for COVID-19 divided by the total number of Ottawa residents in long-term care homes tested on that day</li></ul>Contact: <a href='mailto:OPH-Epidemiology@ottawa.ca' rel='nofollow ugc'>OPH Epidemiology Team | Epidemiology & Evidence, Ottawa Public Health</a></div> Ottawa Public Health https://ottawa.ca/en/city-hall/get-know-your-city/open-data#open-data-licence-version-2-0 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