A study co-authored by Dr. Yesim Tozan, Assistant Professor of Global Health at New York University School of Global Public Health, was published by Environmental Research titled “Reviewing estimates of the basic reproduction number for dengue, Zika and chikungunya across global climate zones.”
Globally, dengue, Zika virus, and chikungunya are important viral mosquito-borne diseases that infect millions of people annually. Their geographic range includes not only tropical areas but also sub-tropical and temperate zones such as Japan and Italy. The relative severity of these arboviral disease outbreaks can vary depending on the setting. This study explores variation in the epidemiologic potential of outbreaks amongst these climatic zones and arboviruses in order to elucidate potential reasons behind such differences.
Findings indicate that the basic reproduction number (R0) of an arboviral outbreak depends on climate zone, with lower R0 estimates, on average, in temperate zones compared to tropical and subtropical zones. The role of other factors as determinants of R0, such as methods, environmental and social conditions, and disease control, should be further investigated. The results also suggest that R0 may increase in temperate regions in response to global warming, and highlight the increasing need for strengthening preparedness and control activities.Tags: Friday Letter Submission, Publish on January 31