Yellow fever and several species of mosquitoes. In cities, it is spread primarily by "Aedes aegypti", a type of mosquito found throughout the tropics and subtropics. The virus is an RNA virus of the genus "Flavivirus". The disease may be difficult to tell apart from other illnesses, especially in the early stages. To confirm a suspected case, blood sample testing with polymerase chain reaction is required. A safe and effective vaccine against yellow fever exists, and some countries require vaccinations for travelers. Other efforts to prevent infection include reducing the population of the transmitting mosquito. In areas where yellow fever is common
Yellow fever in Buenos Aires Yellow fever in Buenos Aires The Yellow Fever in Buenos Aires was a series of epidemics that took place in 1852, 1858, 1870 and 1871, the latter being a disaster that killed about 8% of Porteños: in a city were the daily death rate was less than 20, there were days that killed more than 500 people. The Yellow Fever would have come from Asunción, Paraguay, brought by Argentine soldiers returning from the war just fought in that country, having previously spread in the city of Corrientes. As its worst, Buenos Aires population was reduced to a third because of