Back to Search
Start Over
SARS-CoV-2 Transmission in Alberta, British Columbia, and Ontario, Canada, December 25, 2019, to December 1, 2020.
- Source :
- Disaster Medicine & Public Health Preparedness; Dec2022, Vol. 16 Issue 6, p2428-2437, 10p
- Publication Year :
- 2022
-
Abstract
- Objective: This study aimed to investigate coronavirus disease (COVID-19) epidemiology in Alberta, British Columbia, and Ontario, Canada. Methods: Using data through December 1, 2020, we estimated time-varying reproduction number, R <subscript> t </subscript>, using EpiEstim package in R, and calculated incidence rate ratios (IRR) across the 3 provinces. Results: In Ontario, 76% (92 745/121 745) of cases were in Toronto, Peel, York, Ottawa, and Durham; in Alberta, 82% (49 878/61 169) in Calgary and Edmonton; in British Columbia, 90% (31 142/34 699) in Fraser and Vancouver Coastal. Across 3 provinces, R <subscript> t </subscript> dropped to ≤ 1 after April. In Ontario, R <subscript> t </subscript> would remain < 1 in April if congregate-setting-associated cases were excluded. Over summer, R <subscript> t </subscript> maintained < 1 in Ontario, ~1 in British Columbia, and ~1 in Alberta, except early July when R <subscript> t </subscript> was > 1. In all 3 provinces, R <subscript> t </subscript> was > 1, reflecting surges in case count from September through November. Compared with British Columbia (684.2 cases per 100 000), Alberta (IRR = 2.0; 1399.3 cases per 100 000) and Ontario (IRR = 1.2; 835.8 cases per 100 000) had a higher cumulative case count per 100 000 population. Conclusions: Alberta and Ontario had a higher incidence rate than British Columbia, but R <subscript> t </subscript> trajectories were similar across all 3 provinces. [ABSTRACT FROM AUTHOR]
- Subjects :
- COVID-19
EPIDEMIOLOGY
Subjects
Details
- Language :
- English
- ISSN :
- 19357893
- Volume :
- 16
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Disaster Medicine & Public Health Preparedness
- Publication Type :
- Academic Journal
- Accession number :
- 162467851
- Full Text :
- https://doi.org/10.1017/dmp.2021.78