Several scientific studies point to a UN base in Haiti as the place where cholera was introduced into the country in October 2010.

A UN-commissioned scientist has also said that the world body itself is most likely to blame for the outbreak.

The UN has never accepted responsibility for the cholera epidemic, even though its own investigation found the outbreak stemmed from contamination in a river,right next to its own base, which was not disposing of sewage properly.

The investigation found that Haiti's lack of effective water treatment facilities, made worse by a devastating earthquake, led to the rapid spread of the disease, which has killed about 7,000 people in the country.

Al Jazeera's Kristen Saloomey reports from Seau D'eau, Haiti.