PORT-AU-PRINCE, Haiti — A U.N. acknowledgment that it played a role in introducing cholera to Haiti and vows to aid victims were welcomed Friday in the Caribbean nation, which has experienced the worst outbreak of the disease in recent history.

This week, deputy spokesman Farhan Haq acknowledged the United Nations’ “own involvement” in the introduction of cholera to impoverished Haiti and pledged that “a significantly new set of U.N. actions” will be presented in the next two months.

On Friday, Haq said Secretary-General Ban Ki-moon is developing a package that would provide “material assistance” to cholera victims in Haiti, indicating for the first time that some people might get financial help from the U.N.

Researchers say there is ample scientific evidence the disease was introduced to Haiti’s biggest river by inadequately treated sewage from a base of U.N. peacekeepers from Nepal, one of the units that have rotated in and out of a multinational force in Haiti since 2004.