Here is a Depression infographic that demonstrates: depression is a complex sytem of forces, not merely a collection of sad thoughts and feelings.
Depression does not discriminate against gender, age, religion, race, or disability. It hits everyone. Depression not only affects the person experiencing it, but also their friends and loved ones. Depression is a serious health issue and it is not something that you can just “get over”.
"Underestimating depression can be a lethal mistake. This is particularly true for those on the autism spectrum since […] depression can hide behind autistic traits." At Invisible Strings.