It possesss two cycles distinct epidemiologists (wild and urban). The wild yellow fever is a typical illness of monkeys that live in the tropical and equatorial forests. It occurs of cyclical form, with bigger intensity to each five or seven years. The appearance of human cases of the illness is preceded of epizootias (death of monkeys). The urban yellow fever does not occur in Brazil since 1942, however with the ample dissemination of the Aedes mosquito aegypti in the country has risk of reurbanizao of the virus of the yellow fever. Then Rio De Janeiro exported the yellow fever and the fragilizada population fought against the death, therefore the sick people who were rich looked treatment in the Europe, while the sick people poor were well-taken care of for black healers.

Then, the politics of Brazilian health with ideas and plans is born to try to fight the diseases who reduced the life of the population POLITICS OF the PUBLIC HEALTH IN BRAZIL OLD REPUBLIC In the start of Brazil Republicam Brazil was commanded by the oligarchies, that is, the states richest. The oligarchies were rich because of the coffee production and the part of these profits was applied in the cities, thus making with that an urban growth happens. However, the oligarchies of the old republic searched the support of science to examine environments in physical and social terms of the urban populations. For in such a way, it starts the strong interventions hygienist, in special in So Paulo, therefore she is one of the richest oligarchies, that decided to destine great mounts of money for the area of the health publish, had been the biggest amounts until today onslaught in the health, in relation to the total of annual resources applied by a Brazilian state. After this investment the fiscalizations they had all been much more rigid. became obligator the notifications official of all the cases of illnesses infectum-contagious.