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Worldwide, nearly 10 percent of people are ages 10 to 14, and in developing countries, the percentage is often higher (e.g., Uganda, 16 percent).1 Early adolescence marks a critical time of physical, developmental, and social changes. Interventions during early adolescence may be more effective in shaping healthy attitudes and behaviors than in late adolescence, when attitudes and behaviors are more established. Young adolescents are also more likely to still be in school and less likely to have begun sexual activity.
