Speaking to medical students in Havana, on 19 August 1960, communist revolutionary, guerrilla fighter and doctor Ernesto Che Guevara was pointing out:
"The work that today is entrusted to the Ministry of Health and similar organizations is to provide public health services for the greatest possible number of persons, institute a program of preventive medicine, and orient the public to the performance of hygienic practices [...] Some day, therefore, medicine will have to convert itself into a science that serves to prevent disease and orients the public toward carrying out its medical duties [....] The doctor, the medical worker, must go to the core of his new work, which is the man within the mass, the man within the collectivity" [1].