Global snakebite burden likely much larger than official data suggest, study finds
A new analysis combined data from 79 countries with geostatistical modeling to estimate snake envenoming and deaths. The researchers say many cases go unrecorded because victims in rural tropical regions often lack nearby clinics, transportation, or rely on traditional healers. Sub-Saharan Africa appears to carry the heaviest burden, and the authors call for country-level mapping to help meet WHO targets.
The analysis examined 79 countries' data, including studies available by late March 2025, refreshing a prior worldwide estimate published in 2008. A geostatistical approach merged recorded cases with climate, snake-species variety, and social/economic variables to infer places with missing records.
Yearly envenoming estimates span 2.1 million to 7 million, while deaths range from 274,000 to 513,000. Sub-Saharan Africa carries 45% of cases and fatalities, with incidence and death rates close to triple South Asia's. In over half the nations where dangerous snakes occur, no tally is kept; WHO seeks a 50% reduction in deaths and lasting harm by 2030.
Better country-level mapping could help health agencies target antivenom, clinics, transport, and training toward rural tropical communities where cases are missed. People in sub-Saharan Africa and South Asia, especially those far from care or relying on traditional healers, may benefit if these estimates prompt targeted responses. Because modeled ranges remain uncertain, local validation may be needed before decisions on funding or services.