In this slide, the terms that are commonly used in the literature: adolescents, youth and young people, are listed alongside age bands.
WHO defines adolescents as individuals who are going through a very special phase in their lives – adolescence. A phase during which enormous
physical and psychological changes occur, as do changes in social perceptions and expectations. A phase when an individual is no longer a child, but not yet an adult.
Although according to WHO's definition, adolescents are aged between 10-19, WHO is conscious that adolescence is a phase in an individual's life, rather than a fixed time period.