{"doi":"10.1101/2020.07.18.20156992","title":"SARS-CoV-2 Transmission in Alberta, British Columbia, and Ontario, Canada, January 1-July 6, 2020","abstract":"Abstract Objective To investigate COVID-19 epidemiology in Alberta, British Columbia and Ontario, Canada. Methods We calculated the incidence rate ratio (January 1—July 6, 2020) between the 3 provinces, and estimated time-varying reproduction number, R t , starting from March 1, using EpiEstim package in R. Results Using British Columbia as a reference, the incidence rate ratios in Alberta and Ontario are 3.1 and 4.3 among females, and 3.4 and 4.0 among males. In Ontario, R t fluctuated ~1 in March, reached values >1 in early and mid-April, then dropped <1 in late April and early May. R t rose to ~1 in mid-May and then remained <1 from late May through early July. In British Columbia, R t dropped <1 in early April, but it increased towards the end of April. R t <1 in May while it fluctuated around 1.0 in June and early July. In Alberta, R t > 1 in March; R t dropped in early April and rose again in late April. In much of May, R t <1, but R t increases in early June and fluctuates ~1 since mid-June. Conclusions R t wavering around 1.0 indicated that three provinces of Canada have managed to achieve limited onward transmission of SARS-CoV-2 as of early July 2020.","journal":"medRxiv","year":2020,"id":130419,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":0,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.7391,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":582804,"name":"Yuen Wai Hung","orcid":"0000-0002-1171-109X","position":1,"is_corresponding":false},{"id":551658,"name":"Sylvia K. Ofori","orcid":"0000-0002-9961-9975","position":2,"is_corresponding":false},{"id":551655,"name":"Kamalich Muniz-Rodríguez","orcid":"0000-0002-4786-9438","position":3,"is_corresponding":false},{"id":552927,"name":"Po-Ying Lai","orcid":null,"position":4,"is_corresponding":false},{"id":15756,"name":"Gerardo Chowell","orcid":"0000-0003-2194-2251","position":5,"is_corresponding":false},{"id":513221,"name":"Isaac Chun‐Hai Fung","orcid":"0000-0001-5496-2529","position":0,"is_corresponding":true}],"reference_count":35,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-07-18T23:15:53.196774Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}