New UNAids chief vows to stamp out sexual misconduct and abuse of power

Winnie Byanyima says known cases of sexual harassment were 'tip of the iceberg' as she pledges to restore trust in organisation

The new head of scandal-hit UNAids has vowed to transform the agency's culture to safeguard staff not only from sexual harassment - which she called "the tip of the iceberg" - but any abuse of power by those at the top.

Winnie Byanyima said she would draw on lessons learned following allegations of sexual misconduct at Oxfam, of which she was international executive director until earlier this year, to address problems at the UN agency.