Yellow fever a potential mosquito bite. Long-sleeved clothing, long pants, and socks are useful for prevention. The awareness of peak mosquito exposure is from dusk to dawn. The application of larvicides to water-storage containers can help eliminate potential mosquito breeding sites. Adult mosquitos can be killed through insecticide spray usage, which decreases the transmission of yellow fever. Vaccination is recommended for those traveling to affected areas, because non-native people tend to develop more severe illness when infected. Protection begins by the 10th day after vaccine administration in 95% of people, and had been reported to last for at least 10 years. WHO
Yellow fever blood, hence the Spanish name for yellow fever, "vómito negro" ("black vomit"). There may also be kidney failure, hiccups, and delirium. The toxic phase is fatal in about 20% to 50% of cases, making the overall fatality rate for the disease about 3.0 to 7.5%. However, the fatality rate of those with the toxic phase of the disease may exceed 50%. Surviving the infection provides lifelong immunity, and normally no permanent organ damage results. Yellow fever is caused by the yellow fever virus, a 40– to 50--wide enveloped RNA virus, the type species and namesake of the family "Flaviviridae". It