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According to a WHO report released on 18 September, the humanitarian aid organisation Médecins Sans Frontières ("Doctors Without Borders") is the leading organization responding to the crisis. Médecins Sans Frontières has campaigned since the beginning of the epidemic for a better response from governments and international agencies. Speaking at a United Nations (UN) briefing on 2 September, Joanne Liu, international president of Médecins Sans Frontières, criticized the lack of assistance from UN member countries.