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Skip search results from other journals and go to results- 1 Journal of Medical Internet Research
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We built a large corpus by collecting Korean tweets mentioning COVID-19 vaccine brands (eg, Pfizer, Moderna, Astra Zeneca, Janssen, and Novavax), via academic research access [31] authorized by Twitter, posted from February 2021 to March 2022. We removed emoticons from the collected documents before subsequent preprocessing and then constructed an initial corpus with 1,689,158 tweets.
In turn, we preprocessed the initial corpus through a series of steps from stemming through short-tweet elimination.
J Med Internet Res 2023;25:e42623
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