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. This book deals with substance use and misuse, interpersonal violence, suicidal behaviour and unintentional injuries, behavioural risk factors of non-communicable diseases, under and over nutrition, child abuse and child labour, oral and hand hygiene in Asian and African countries. We hope this will be of interest to our readers.