German AIDS Foundation at Deutsche Oper Berlin in Berlin, Germany.

On November 4, 2017, Princess Mabel of Orange-Nassau attended the 24th Opera Gala (Festliche Operngala, AIDS-Gala) held by German AIDS Foundation at Deutsche Oper Berlin in Berlin, Germany. Princess Mabel was presented ‘2017 World Without AIDS Award’ by Noëlla for her outstanding humanitarian work in the "global fight against Hiv/Aids".