A Bolivian soldier fumigates a slum to prevent dengue in Villa Tunari in the Chapare region, some 310 km east of La Paz, Oct. 14. Bolivian authorities have deployed military personnel with pesticides to fumigate slums in an effort to preemptively combat Dengue fever.
Smaller slums like Villa Tunari have poor plumbing that allows mosquito populations to thrive. Dengue fever is often carried by mosquitoes, and is occurs in countries with tropical climates. Bolivia has had several outbreaks of the illness in recent years, leading to several deaths and thousands left ill.