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To address this problem, we concentrate on the basic reproduction number <jats:italic>R<\/jats:italic><jats:sub>0<\/jats:sub>, which is not sensitive to testing coverage and represents transmissibility in an absence of social distancing and in a completely susceptible population. While many variables may potentially influence <jats:italic>R<\/jats:italic><jats:sub>0<\/jats:sub>, a high correlation between these variables may obscure the result interpretation. Consequently, we combine Principal Component Analysis with feature selection methods from several regression\u2010based approaches to identify the main demographic and meteorological drivers behind <jats:italic>R<\/jats:italic><jats:sub>0<\/jats:sub>. We robustly obtain that country's wealth\/development (GDP per capita or Human Development Index) is the most important <jats:italic>R<\/jats:italic><jats:sub>0<\/jats:sub> predictor at the global level, probably being a good proxy for the overall contact frequency in a population. This main effect is modulated by built\u2010up area per capita (crowdedness in indoor space), onset of infection (likely related to increased awareness of infection risks), net migration, unhealthy living lifestyle\/conditions including pollution, seasonality, and possibly BCG vaccination prevalence. Also, we argue that several variables that significantly correlate with transmissibility do not directly influence <jats:italic>R<\/jats:italic><jats:sub>0<\/jats:sub> or affect it differently than suggested by na\u00efve analysis.<\/jats:p>","DOI":"10.1029\/2021gh000432","type":"journal-article","created":{"date-parts":[[2021,9,2]],"date-time":"2021-09-02T22:14:07Z","timestamp":1630620847000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Inferring the Main Drivers of SARS\u2010CoV\u20102 Global Transmissibility by Feature Selection Methods"],"prefix":"10.1029","volume":"5","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2903-3119","authenticated-orcid":false,"given":"Marko","family":"Djordjevic","sequence":"first","affiliation":[{"name":"Faculty of Biology Quantitative Biology Group Institute of Physiology and Biochemistry University of Belgrade  Belgrade 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