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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2007 1
2008 2
2009 3
2011 1
2012 1
2013 1
2015 2
2016 6
2017 3
2018 6
2019 4
2020 6
2021 6
2022 15
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Page 1
Effectiveness of BNT162b2 and mRNA-1273 covid-19 vaccines against symptomatic SARS-CoV-2 infection and severe covid-19 outcomes in Ontario, Canada: test negative design study.
Chung H, He S, Nasreen S, Sundaram ME, Buchan SA, Wilson SE, Chen B, Calzavara A, Fell DB, Austin PC, Wilson K, Schwartz KL, Brown KA, Gubbay JB, Basta NE, Mahmud SM, Righolt CH, Svenson LW, MacDonald SE, Janjua NZ, Tadrous M, Kwong JC; Canadian Immunization Research Network (CIRN) Provincial Collaborative Network (PCN) Investigators. Chung H, et al. Among authors: basta ne. BMJ. 2021 Aug 20;374:n1943. doi: 10.1136/bmj.n1943. BMJ. 2021. PMID: 34417165 Free PMC article.
4CMenB vaccine effectiveness: reasons for optimism.
Basta NE, Christensen H. Basta NE, et al. Lancet. 2016 Dec 3;388(10061):2719-2721. doi: 10.1016/S0140-6736(16)32061-X. Epub 2016 Oct 27. Lancet. 2016. PMID: 28100431 Free PMC article. No abstract available.
50 results