Could I have a statement, please? buy isotretinoin canada As to the U.N.'s responsibility, a series of studies point toward cholera's introduction by infected U.N. peacekeeping forces who arrived in Haiti just before the outbreak. The epidemic emanated from a U.N. camp with documented sanitation deficiencies in Haiti's central highlands. And the cholera bacteria spread down the Artibonite River system into which the camp's sewage was discharged.