Severe dengue outbreaks (DOs) affect the majority of Asian and Latin American countries . Whether all DOs always occurred in sub-tropical and tropical areas (STTA) has not been verified . We downloaded abstracts by searching keywords “ dengue (MeSH Major Topic) ” from Pubmed Central since 1950, including three collections: country names in abstracts (CNA), no abstracts (WA), and no country names in abstracts (Non-CNA). Visualizations were created to present the DOs across countries/areas in STTA . The percentages of mentioned country names and authors ’ countries in STTA were computed on the CNA and Non-CNA bases . The social network analysis was applied to highlight the most cited articles and countries . We found that (1) three collections are 3427 (25.48 %), 3137 (23.33 %), and 6884 (51.19 %) in CNA, WA, and Non-CNA, respectively; (2) the percentages of 94.3% and 79.9% were found in the CNA and Non-CNA groups; (3) the most mentioned country in abstracts were India, Thailand, and Brazil; (4) most authors in the Non-CNA collections were from the United States, Brazil, and China; (5) the most cited article (PMID = 23563266) authored by Bhatt et al . had 2604 citations since 2013 . Our findings provide in-depth insights into the DO knowledge . The research approaches are recommended for authors in research on other infectious diseases in the future, not just limited to the DO topic.