Young people are a sizable age group, comprising approximately 30% of the population in Latin America and the Caribbean. Adolescents are generally considered to be a "healthy" segment of the population, and their health needs are often overlooked. However, investing in health and education for young people and the alignment of economic policies enable productivity and economic growth. Furthermore, investment in young people's health is essential to protect investments made in childhood (e.g. significant investments in vaccines and food programs) and secures the health of the future adult population. Most habits detrimental to health are acquired during adolescence and youth and manifest themselves as health problems in adulthood (e.g. lung cancer caused by the consumption of tobacco), adding an avoidable financial burden to the health systems.
Another document of interest from the 2011 World Health Assembly is available here: Youth and Health Risks

Fact Sheets

Youth violence is a global public health problem. It includes a range of acts from bullying and physical fighting, to more severe sexual and physical assault to homicide. Promoting healthy behaviours during adolescence, and taking steps to better protect young people from health risks are critical for the prevention of health problems in adulthood, and for countries' future health and ability to develop and thrive. Adolescent pregnancies are a global problem that occurs in high, middle, and low income countries. Around the world, adolescent pregnancies are more likely to occur in marginalized communities, commonly driven by poverty and lack of education and employment opportunities