A pediatrician is a medical doctor who specializes in the care of infants, children, and young adults from birth up to age 21. They focus on prevention, detection, and management of physical, social, and behavioral issues that affect children. Pediatricians treat infections, injuries, and diseases in children. They are responsible for health supervision, screening, diagnosis, treatment, and providing anticipatory guidance to patients, parents, and communities. Pediatrics is the branch of medicine focused on reducing child mortality, controlling infectious diseases, and promoting healthy lifestyles in children and adolescents.