when mentioning it was lower than the US even then.
Summary pattern here : http://en.wikipedia.org/wiki/List_of_countries_by_infant_mortality_rate
Best summarised as they care about their infants.
Cuba also has a very high literacy rate : http://en.wikipedia.org/wiki/List_of_countries_by_literacy_rate That had followed a purposeful campaign early sixties :
The Cuban Literacy Campaign (Spanish: Campaña Nacional de Alfabetización en Cuba) was a year-long effort to abolish illiteracy in Cuba after the triumph of the Cuban Revolution.[1] It began on January 1 and ended on December 22, 1961, becoming the world's most ambitious and organized literacy campaign.[2][3]
Before 1959 the official literacy rate for Cuba was between 60-76%, with educational access in rural areas and a lack of instructors the main determining factor.[4] As a result, the Cuban government of Fidel Castro at Che Guevara's behest dubbed 1961 the "year of education", and sent "literacy brigades" out into the countryside to construct schools, train new educators, and teach the predominately illiterate Guajiros (peasants) to read and write. The campaign was "a remarkable success", and by the completion of the campaign, 707,212 adults were taught to read and write, raising the national literacy rate to 96%.[4]
http://en.wikipedia.org/wiki/Cuban_Literacy_Campaign