A worker from the municipality of Sucre carries out fumigation to help control the spread of Chikungunya and dengue fever, which are caused by viruses carried by mosquitoes, in the Petare slum district of Caracas September 22, 2014. Medical shortages have complicated Venezuela’s efforts to treat outbreaks of mosquito-borne fevers, creating long lines at pharmacies to buy analgesics and leaving the ill without ways to control the swelling joints and aching bones that the disease causes. Venezuela has South America’s highest incidence of chikungunya, a virus of African origin whose name comes from a Tanzanian term for being doubled-over in pain. It also has the fourth-highest incidence of dengue on the continent this year. Picture taken September 22, 2014. To match Feature VENEZUELA-HEALTH/ REUTERS/Carlos Garcia Rawlins (VENEZUELA – Tags: HEALTH SOCIETY POLITICS)