the paramount principle of organizational structure, activity, and leadership of Marxist-Leninist parties, the socialist state, and the management of a socialist economy. The essence of democratic centralism lies in the combination of democracy and centralization.Democracy is the sovereignty, independent activity, and initiative of the toilers; and the election of directing bodies and their accountability to the masses.he CPSU operates, on the basis of democratic centralism, as a monolithic organization unified by common ideological, organizational, and tactical principles, which are binding on every Communist. Party leadership is exercised from one central point.
Exposure to lead can have a wide range of effects on a child's development and behavior. Even when exposed to small amounts of lead levels, children may appear inattentive, hyperactive and irritable. Children with greater lead levels may also have problems with learning and reading, delayed growth and hearing loss.
To estimate the number of children aged 1â5 years in the United States at risk for adverse health effects from lead exposure and to assess the impact of prevention efforts, CDC analyzed data from the National Health and Nutrition Examination Survey (NHANES) from the periods 1999â2002 to 2007â2010. Trends in blood lead levels and blood lead testing among U.S. children aged 1 to 5 years: 1998â2004. 2  Pediatrics 2009;123:e376â85. 3  CDC. 4  Blood lead levelsâUnited States, 1999â2002.