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The establishment of wellhead protection areas it is a technique of aquifer protection broadly utilized in Cuba, so much for the sources of ground waters for public supply, like for those considered as minerals, however, they are many the causes that impact in the accuracy in its delimitation, therefore, to assume that the calculated areas coincide exactly, with those that in fact should be protected they cause a false sensation of security that can put in risk the health of the population and the own investment. In such a sense, a study has been elaborated in the aquifer Margarita, located in the north of the provincia Villa Clara that shows the limitations of the methods of delimitation of the wellhead protection areas used at the moment in Cuba, using as comparative method to the numeric models VisualModflow to consider occurs bigger precision. Are discussed the causes of the discrepancies in the obtained results and they intend modifications to the methods used in Cuba. The proposed modificacióneses improve in more than 30% the obtained results, what favors their application under the analyzed conditions. [ABSTRACT FROM AUTHOR]

The article presents the medical lessons learned by Canada on Cuba's early childhood and maternal health management. It mentions that the Canadian Senate Subcommittee on Population Health examines the medical care models used by Cuba. The observation of Canada aims to cut down the health inequality in the country. The author discusses how Cuba performs low-cost and effective health interventions despite its low gross domestic product (GDP). In addition, he elaborates Cuba's use of polyclinic method on early childhood development and maternal health. It also analyzes other Cuba's approach such as multilevel collaborative programs, science-based and educate-your-child program, on maternal and early childhood healthcare.