The World Health Organization says it has created a panel of independent experts to assess its response to the biggest-ever Ebola outbreak in history.

In a statement Tuesday, the U.N. health agency said the panel was commissioned after a resolution passed by its executive board. The panel will be chaired by Barbara Stocking, a former chief executive of Oxfam GB. A preliminary report is due in May.

WHO's handling of the Ebola outbreak that has killed over 9,900 people in West Africa has been heavily criticized. WHO admitted in an internal draft report that it fumbled early attempts to curb the outbreak, blaming incompetent staff and a lack of real-time information. Others also criticized WHO for not declaring an international health emergency until nearly 1,000 people had died.