<Ul> <Li> Typically a sign of mourning, or otherwise in memoriam </Li> <Li> Awareness of POW / MIAs </Li> <Li> Anti-violence campaign in New Zealand . </Li> <Li> Black Ribbon Movement of medical professions and medical students against the appointment of military officers to positions within Ministry of Health in Myanmar (Burma) in August 2015 . </Li> </Ul> <Li> Typically a sign of mourning, or otherwise in memoriam </Li> <Li> Awareness of POW / MIAs </Li> <Li> Anti-violence campaign in New Zealand . </Li>

What does the purple cancer sign stand for