Table 1. Total number of combined Twitter and Facebook posts for each news organization used in analysis and links to each news organizations’ original COVID-19 vaccine related article posted on their respective social media accounts.

News organization	Number of posts	Link to original article
National Post	308	https://nationalpost.com/health/which-canadians-get-the-covid-19-vaccine-first-experts-are-struggling-to-decide
Maclean’s	642	https://www.macleans.ca/society/health/how-anti-vaxxers-could-disrupt-the-cure-for-the-covid-19-pandemic/
The Globe and Mail	70	https://www.theglobeandmail.com/canada/article-moderna-inc-says-its-covid-19-vaccine-shows-positive-results-among/
Global News	745	https://globalnews.ca/news/7251593/canada-pfizer-coronavirus-vaccine/
CBC	498	https://www.cbc.ca/news/world/coronavirus-covid19-world-sept4-1.5712020
CTV	1,468	https://www.ctvnews.ca/health/coronavirus/feds-sign-deals-with-novavax-and-johnson-johnson-to-secure-millions-of-vaccine-doses-1.5085911

Abbreviations: CBC, Canadian Broadcasting Corporation; COVID-19, coronavirus disease 2019; CTV, Canadian Television Network