Depression is the most prevalent mental illness. According to the World Health Organisation, there are more than 264 million people of all ages who suffer from depression in 2020. Different studies have shown that approximately one in 16 people have a probable risk of suffering a single episode of depression in their lifetime. Depression tends to be recurrent and it is more likely that patients suffer from more than one episode in their lifetime. Approximately one in eight people probably suffer from a moderate form of recurrent depression in their life (one in 14 experience severe recurrent depression). Depression impacts on patients, their immediate circle of friends and family, as well as the society.