Can a preschooler be depressed?

Many people still believe very young children are immune from depression because they are too emotionally immature.  I’ve done my best to educate folks that clinical depression is prevalent even amongst very young children.  Previous research suggests that depression is observed in approximately 2% of American preschoolers.  A newer study now points out that depression among children ages 3-6 can be chronic even over a period of two years.  I agree that the use of medication in children this young is risky and not well researched so should largely be avoided.  Instead a child needs a thorough assessment and active participation in psychotherapy individually and with his or her family.