9/22/2022 Estimated effectiveness of COVID-19 vaccines against Omicron or Delta symptomatic infection and severe outcomes Buchan SA, Chung H, Brown KA, Austin PC, Fell DB, Gubbay JB, Nasreen S, Schwartz KL, Sundaram ME, Tadrous M, Wilson K, Wilson SE, Kwong JC. JAMA Netw Open. 2022; 5(9):e2232760. Epub 2022 Sep 22. DOI: https://doi.org/10.1001/jamanetworkopen.2022.32760
9/7/2022 Effectiveness of COVID-19 vaccines over time prior to Omicron emergence in Ontario, Canada: test-negative design study Chung H, Austin PC, Brown KA, Buchan SA, Fell DB, Fong C, Gubbay JB, Nasreen S, Schwartz KL, Sundaram ME, Tadrous M, Wilson K, Wilson SE, Kwong JC; on behalf of the Canadian Immunization Research Network (CIRN) Provincial Collaborative Network (PCN) Investigators. Open Forum Infect Dis. 2022; Sep 7 [Epub ahead of print]. DOI: https://doi.org/10.1093/ofid/ofac449
7/6/2022 Effectiveness of a fourth dose of covid-19 mRNA vaccine against the omicron variant among long term care residents in Ontario, Canada: test negative design study Grewal R, Kitchen SA, Nguyen L, Buchan SA, Wilson SE, Costa AP, Kwong JC. BMJ. 2022; 378:e071502. Epub 2022 Jul 6. DOI: https://doi.org/10.1136/bmj-2022-071502